Sedersi: Full Conjugation (Pronominal)

Sedersi (to sit down) is the verb of arrival — the action that closes a sequence of motion and opens a moment of stillness. Siediti, fai come a casa tua ("sit down, make yourself at home"); si sieda pure, signora ("please have a seat, madam"); sediamoci un attimo ("let's sit for a minute"). It is the verb of dinner tables, train compartments, doctors' offices, and the universal Italian invitation to slow down and stay a while.

Sedersi is grammatically a true reflexive in the same sense as alzarsi: the action of "sitting oneself" loops back onto the subject. But it inherits two complications that make it a step harder than the regular -arsi reflexives. First, it belongs to the small but high-frequency family of verbs with the e → ie diphthong shift in stressed syllables — sedo becomes siedo, sede becomes siede, on the same logic that makes venīre yield vieni and tenēre yield tieni. Second, it has two competing form sets in the present tense: the modern, dominant siedo / siedi / siede / siedono and the older, literary seggo / siedi / siede / seggono. Both are correct standard Italian; the siedo family is what you should use in speech, while seggo and seggono survive in formal prose, fixed expressions ("il presidente siede / segga sul seggio"), and poetry.

For the underlying logic of the e → ie alternation across the Italian verb system, see stem change e → ie.

Pronunciation

The diphthong ie in siedo is a single syllable, pronounced /jɛ/ — a glide /j/ followed by an open /ɛ/. Do not pronounce it as two syllables /i.e/. The /ɛ/ is open ("eh" rather than "ay"), since this is a closed-stem stressed vowel inherited from Latin short ĕ.

The literary alternative mi seggo /ˈsɛɡɡo/ uses a hard /ɡɡ/ — the double consonant comes from Latin sedeo > *seggo via the universal Italian palatalisation pattern. It is the same root as seggio (a seat, an electoral seat) and seggiola (chair, regional/diminutive). You will not hear seggo in everyday conversation; you will encounter it in nineteenth-century novels and formal political writing.

Indicativo presente — the modern (preferred) paradigm

The diphthong ie appears exactly where the stem is stressed: 1sg, 2sg, 3sg, 3pl. In the 1pl and 2pl, the stress falls on the ending (-iamo, -ete), and the unstressed stem stays plain e — sediamo, sedete. This stress-driven alternation is the heart of the e → ie pattern and applies to venire/vieni and tenere/tieni identically.

The literary alternative: seggo / seggono

The older forms mi seggo (1sg) and si seggono (3pl) survive in formal and literary contexts. They share the 2sg, 3sg, and plural-non-3pl forms with the modern paradigm — the alternation is only in 1sg and 3pl:

In modern speech and most modern writing, prefer siedo / siedono. Seggo / seggono is appropriate in juridical, parliamentary, and ecclesiastical contexts (where one occupies a seat, often metaphorically), and in literary or archaising registers. Il giudice siede al banco is everyday; il giudice segga sul seggio is judicial. A learner can safely ignore seggo until reading nineteenth-century literature; a translator working on legal texts must know it.

Imperfetto

The imperfetto is fully regular and uses the plain stem sed- with no diphthong. This is universal: in the imperfetto, the stress always falls on the -ev- suffix, never on the stem, so the e → ie shift never triggers. Used heavily for past habitual sitting (da bambino mi sedevo sempre sul bracciolo del divano) and for the durative state of being seated (la nonna sedeva sotto l'albero a sferruzzare).

Passato remoto

Sedersi is one of the small group of -ere verbs (credere, dovere, potere, vendere, etc.) that has two parallel passato remoto forms in 1sg, 3sg, 3pl: a regular set on -ei, -é, -erono and an alternative set on -etti, -ette, -ettero. Both are correct; the -etti set is generally more common in writing and the -ei set in speech, but neither is wrong. The forms with -é carry an obligatory acute accent (rare in Italian — most accented final vowels take a grave accent, but -é in this -ere paradigm is acute by tradition), or a grave accent -è in some normative grammars. In practice, the si sedette form is so much more frequent that the accented form is rarely needed.

The 2sg, 1pl, and 2pl have a single regular form: ti sedesti, ci sedemmo, vi sedeste. The double m in sedemmo is mandatory.

Futuro semplice

The future stem is sieder- with the diphthong, because the stem vowel e is in a stressed position before the future endings (the -er- of the future system shifts stress to the stem when the syllable structure permits). A historical alternative sederò / sederai... without the diphthong existed in older Italian and survives in some dialects, but modern standard Italian strongly prefers siederò. Mandatory grave accents on mi siederò (1sg) and si siederà (3sg).

Condizionale presente

Same sieder- stem, conditional endings. Single-m vs double-m trap: ci siederemo (future) vs ci siederemmo (conditional).

Congiuntivo presente

Like the present indicative, the congiuntivo presente has two parallel paradigms. Modern sieda / siedano dominates speech; literary segga / seggano survives in formal writing. The 1pl and 2pl forms (ci sediamo, vi sediate) are the same in both paradigms because they are unstressed on the stem and so escape the alternation entirely.

Congiuntivo imperfetto

Fully regular -ere congiuntivo imperfetto on the unstressed stem sed- (no diphthong, because the stress falls on the suffix).

Imperativo

The imperative of sedersi is constantly used in Italian — every host says it, every doctor says it, every grandmother says it. The forms divide along the familiar reflexive-imperative split: pronoun attached to the end in informal forms (tu, noi, voi); separate, before the verb in formal forms (Lei, loro), which borrow from the congiuntivo presente.

The diphthong appears in the tu form siediti (because the stem is stressed) and in the formal si sieda / si seggano (also stressed); it is absent in sediamoci and sedetevi (where stress falls on the ending, not the stem).

Negative imperative

The negative tu imperative has two correct forms: non sederti (attached) or non ti sedere (separate). Both natural; attached form slightly more common. Non sedersi (using the bare infinitive) is the "no sitting" sign style — non sedersi sull'erba ("do not sit on the grass") on a public sign.

Forme non finite

The participle seduto is fully regular but doubles as one of the most-used adjectives in everyday Italian: essere seduto ("to be seated") is the durative state that follows the action of sitting down. Sono seduto = "I am seated, I am sitting" (state); mi sono seduto = "I sat down" (event). The distinction is the same one English makes between "I'm sitting" and "I sat down."

The pronoun adapts to the subject in non-finite forms: sedermi, sederti, sedersi, sederci, sedervi, sedersi for the infinitive; sedendomi, sedendoti, sedendosi... for the gerund.

Compound tenses: ESSERE with subject agreement

All reflexive verbs use ESSERE as their auxiliary, and the past participle agrees with the subject in gender and number.

Full set of compound tenses, in 1sg masculine form (replace -uto with -uta, -uti, -ute as needed):

Construction: sedersi a / sedersi su / sedersi in

Italian distinguishes carefully between the place at which one sits down (a meal, a meeting, a desk — introduced by a) and the surface on which one sits (a chair, a sofa, the grass — introduced by su). A third pattern uses in for "sitting in" a vehicle, on a category of seat, or in an institutional position.

sedersi a + place / activity

sedersi su + surface

sedersi in + vehicle / institutional seat

Etymology

Sedersi comes directly from Latin sedēre ("to sit"), one of the most stable Indo-European roots — same family as English sit, seat, settle, sedentary, sediment, session, German sitzen, Spanish sentarse, French s'asseoir. The Italian reflexive form sedersi is a medieval innovation; classical Latin used the bare sedere both for "to be sitting" (state) and "to sit down" (action), with context distinguishing them. Italian, like Spanish (sentarse) and French (s'asseoir), grammaticalised the reflexive pronoun to mark the action of sitting down, leaving the bare sedere for the state — except that bare sedere is now archaic in everyday Italian, replaced by essere seduto for the state and sedersi for the action.

The literary forms seggo, seggono, segga, seggano come from Latin *sedi̯o, sedeunt with a palatalisation of the dy cluster to gg — the same pattern that gives Italian foggia from fovea, raggio from radius. The double gg preserves an old phonological process that the modern siedo / siedono paradigm has erased.

The noun sede ("seat, headquarters, office") is the cognate noun: la sede del partito, la sede di Roma. The noun seggio is also from this root: an electoral seat, a parliamentary seat, the throne (il seggio papale). And seggiola (small chair, regional) — same family.

Idiomatic and high-frequency expressions

Common mistakes

Key takeaways

1. Sedersi has the e → ie diphthong shift in stressed stem syllables. Singular and 3pl forms have ie (siedo, siedi, siede, siedono); 1pl and 2pl have plain e (sediamo, sedete) because the stress falls on the ending.

2. Two parallel form sets in present indicative and congiuntivo presente. Modern siedo / siedono / sieda / siedano dominates speech; literary seggo / seggono / segga / seggano survives in formal and elevated registers. Use the modern set unless you're translating legal or literary prose.

3. All reflexives take ESSERE in compound tenses with subject agreement on the participle: mi sono seduto (m), mi sono seduta (f), ci siamo seduti (mixed). Never ho seduto.

4. The participle seduto is regular but doubles as a high-frequency adjective: essere seduto = "to be seated" (state). Distinguish mi sono seduto (event: "I sat down") from sono seduto (state: "I am seated, I'm sitting").

5. Three different prepositions for the place of sitting:

   • a for activities and meal-table contexts: sedersi a tavola, sedersi al pianoforte.
   • su for surfaces: sedersi sulla sedia, sedersi sul divano, sedersi sull'erba.
   • in for vehicles and institutional seats: sedersi in macchina, sedersi in poltrona, sedere in Parlamento.

6. The future and conditional preserve the diphthong: mi siederò, mi siederei. Older sederò is no longer used.

7. The imperative is everywhere in Italian: siediti! (informal), si sieda! (formal), sediamoci! (let's), sedetevi! (you all). Pronoun attaches to informal forms and stays separate before formal ones.

For the broader pattern of e → ie verbs, see stem change e → ie. For the universal logic of reflexive auxiliaries and clitic placement, see the reflexive overview. The companion verb in the morning sequence is alzarsi.