Cause, Result, and Sequence Markers

When you reason out loud — it snowed, therefore we closed; firstly… secondly… finally — you need markers that signal cause, result, and order. Icelandic's are mostly adverbs, which means (because Icelandic is verb-second) that fronting them inverts the verb and subject — a mechanical trap for English speakers, since English keeps the subject first after "therefore." And one of these words, því, is genuinely two-faced: depending on where it sits, it means "because" or "therefore." This page sorts the markers into cause, result, and sequence, and then pins down því until its two lives are clearly separated.

(The causal conjunctions that build subordinate clauses — af því að, vegna þess að, þar sem — belong to the Conjunctions section. Here we stay at the discourse level: which adverbial marker links two already-finished thoughts, and what inversion follows.)

Result markers: þess vegna, þar af leiðandi, af þeim sökum

These point forward from a cause to its consequence: this happened, therefore that. All three are adverbials, so fronting them throws the verb to second position.

Þess vegna ("therefore," literally "for that reason," with þess the genitive of það) is the everyday default. Fronted, it inverts:

Þar af leiðandi ("consequently") and af þeim sökum ("for that reason") are the (formal) cousins, at home in reports, essays, and careful speech. They behave identically — fronted, they invert.

því: the two-faced word

Now the famous ambiguity. Því is two different things that happen to share a spelling, and position tells them apart:

• Clause-initial því is a causal conjunction, "because / for." It introduces a clause giving the reason, much like the slightly literary English "for": …*því hann var veikur* ("…for he was ill").
• Mid- or post-verbal því is the dative of það used adverbially, meaning "therefore / so." It's the same word as in þess vegna's cousin, just bare: Hann var veikur og gat *því ekki komið* ("He was ill and therefore couldn't come").

Same four letters, opposite direction of reasoning — one points back to a cause, the other points forward to a result — and only the position disambiguates.

Note the accent: it is því (with í), the dative of það — distinct from þvi without an accent, which does not exist as a standard form. The accent is not optional decoration; því is the only correct spelling.

A practical register note: clause-initial causal því ("for") is slightly (literary) / elevated — common in writing and careful speech, less so in casual chat, where people prefer af því að or því að. The "therefore" því is fully neutral and everyday.

Sequence markers: ordering your points

When you lay out points in order, Icelandic gives you a tidy set of ordinals-turned-adverbs.

The í fyrsta lagi … í öðru lagi … í þriðja lagi frame is the standard way to enumerate arguments, especially in writing and argument. Each is an adverbial, so fronting inverts.

To close a list, að lokum ("finally / in conclusion") or loks ("at last") seals it. Don't confuse loks (sequencer, "finally" in a list) with loksins ("finally!" / "at long last," expressing relief that something awaited has happened).

fyrst: firstly, or "since"

Fyrst earns a separate flag because it does double duty. As a sequencer it means "first(ly)." But fyrst is also a causal/temporal conjunction meaning "since / seeing as" — introducing a reason the listener already accepts: Fyrst þú ert hér… ("Since you're here…"). Context separates them: a bare fyrst opening a list is "firstly"; fyrst + a clause giving a taken-for-granted premise is "since."

Register: when to reach for which

A real stylistic point competitors skip. In formal writing — essays, reports, official prose — the preferred result markers are þess vegna, þar af leiðandi, and af þeim sökum, set between two full sentences. The causal conjunction af því að ("because") is fine in speech but reads as flat and conversational when overused in formal text; good formal writing tends to state the cause, then mark the result with an adverbial rather than chaining af því að clauses.

English vs Icelandic

Two differences dominate. First, inversion. English "therefore," "consequently," "firstly" leave the subject in front of the verb ("Therefore, we closed"). Every Icelandic equivalent here is an adverb, so fronting it flips verb and subject (Þess vegna lokuðum við). This is the error you'll make most. Second, því. English uses separate words for the two directions of reasoning — "because/for" (cause) versus "therefore/so" (result). Icelandic collapses both onto the single form því, disambiguated only by position. An English speaker, used to two distinct words, won't expect one word to do both jobs and must learn to read the position.

Common Mistakes

Front þess vegna and the verb must come second — lokuðum við, not við lokuðum. English's subject-first "therefore, we…" is the source of this error.

The formal result markers invert just like the everyday ones. Multi-word þar af leiðandi counts as one first element.

Position is everything with því. After the verb it means "therefore"; at the start of a clause it means "because/for." Don't put the "therefore" því clause-initially.

The listing adverbs í fyrsta lagi, í öðru lagi, etc. front like any other adverbial, so the verb inverts.

The closer að lokum obeys V2 too: fronted, the verb comes before the subject.

Key Takeaways

• Result markers — þess vegna (everyday), þar af leiðandi / af þeim sökum (formal) — are adverbs, so fronting inverts the verb and subject.
• því is two-faced, sorted by position: clause-initial = "because/for" (causal, slightly literary); after the verb = "therefore/so" (the dative of það). Mind the accent — því, always.
• Sequence: open with í fyrsta lagi … í öðru lagi … í þriðja lagi, chain with þá / svo / næst, close with að lokum / loks. Don't confuse list-final loks with relief-loksins.
• fyrst does double duty: "firstly" (sequencer) or "since/seeing as" (causal conjunction).
• In formal writing, prefer the result adverbs over stacking af því að clauses, which read as conversational.