Greek can negate an entire clause or build a new word with a negative meaning. Δεν γνωρίζω τον δρόμο means “I do not know the road”; ο δρόμος είναι άγνωστος describes the road as “unknown.” The first uses grammatical negation, while the second uses derivation to create a dictionary word with its own stress and inflection.
Δεν γνωρίζω αυτή τη λέξη, αλλά το νόημά της δεν είναι εντελώς άγνωστο.
dhen ghnorízo aftí ti léksi, alá to nóimá tis dhen íne endelós ághnosto.
I don't know this word, but its meaning is not entirely unfamiliar.
For clause-level δεν and μη(ν), see the negation overview. This page is the sole owner of negative word formation.
Privative α- and αν-
Privative α- broadly contributes “without, lacking, not.” The usual shape before a consonant is α-; many established formations before a vowel use αν-. Stress and stem shape belong to the derived word.
| Base | Negative derivative | Meaning | What changes |
|---|---|---|---|
| δυνατός | αδύνατος | weak; impossible | stress moves to the antepenult |
| γνωστός | άγνωστος | unknown, unfamiliar | stress shifts onto the prefix |
| τυχερός | άτυχος | unlucky, unfortunate | different adjectival stem |
| ήσυχος | ανήσυχος | worried, restless | αν- before the vowel |
| ισορροπία | ανισορροπία | imbalance | αν- before the vowel |
Χωρίς τον σωστό κωδικό είναι αδύνατη η πρόσβαση στον λογαριασμό.
chorís ton sostó kodhikó íne adhínati i prózvasi ston loghariasmó.
Without the correct password, access to the account is impossible.
Ένας άγνωστος αριθμός με κάλεσε τρεις φορές το πρωί.
énas ághnostos arithmós me kálese tris forés to proí.
An unknown number called me three times this morning.
Έμεινε ανήσυχος μέχρι να λάβει νέα από την κόρη του.
émine anísichos méchri na lávi néa apó tin kóri tu.
He remained worried until he heard from his daughter.
Η ανισορροπία ανάμεσα στα έσοδα και τα έξοδα μεγάλωσε.
i anisorropía anámesa sta ésodha ke ta éksodha meghálose.
The imbalance between income and expenditure grew.
Ατυχία is built around τύχη “luck” and contrasts lexically with ευτυχία “happiness/good fortune”; it is not produced by simply placing α- before the whole word ευτυχία.
δυσ- and ευ-: bad or hard versus good or favorable
Δυσ- does not simply mean “not.” It contributes difficulty, badness, or an unfavorable condition. Its high-value counterpart is ευ-, associated with ease, goodness, or favorable outcome. The contrast is clearest in established pairs:
| ευ- family | δυσ- family | Contrast |
|---|---|---|
| ευτυχία | δυστυχία | happiness/good fortune ↔ misfortune |
| εύκολος | δύσκολος | easy ↔ difficult |
| ευκολία | δυσκολία | ease ↔ difficulty |
| ευανάγνωστος | δυσανάγνωστος | easy ↔ hard to read (formal/careful) |
Το πρώτο κεφάλαιο είναι εύκολο, αλλά το δεύτερο είναι αρκετά δύσκολο.
to próto kefáleo íne éfkolo, alá to dhéftero íne arketá dhískolo.
The first chapter is easy, but the second is quite difficult.
Το χειρόγραφο είναι δυσανάγνωστο, όχι όμως εντελώς ακατανόητο.
to chiróghrafo íne dhisanághnosto, óchi ómos endelós akatanóito.
The manuscript is hard to read, though not completely incomprehensible. (careful/formal)
Calling δυσανάγνωστος merely “not readable” loses its graded meaning: it normally means reading is difficult. These learned families are powerful for recognition but are not freely attached to any word.
Reversative ξε- with verbs
Verbal ξε- can reverse, remove, or undo a state: κλειδώνω → ξεκλειδώνω “lock → unlock,” βάφω → ξεβάφω “remove color / fade,” ντύνομαι → ξεντύνομαι “get dressed → get undressed.” This is the Greek resource closest to English un- or de- on verbs.
Ξεκλείδωσε την πίσω πόρτα και άφησε τα κλειδιά πάνω στο τραπέζι.
kseklídhose tin píso pórta ke áfise ta klidhiá páno sto trapézi.
She unlocked the back door and left the keys on the table.
Αυτό το μπλουζάκι ξεβάφει, γι' αυτό πλύνε το χωριστά.
aftó to bluzáki kseváfi, yaftó plíne to choristá.
This T-shirt's color runs, so wash it separately.
Το παιδί ξεντύθηκε μόνο του και φόρεσε τις πιτζάμες του.
to pedhí ksendíthike móno tu ke fórese tis pidzámes tu.
The child got undressed by itself and put on its pajamas.
Some ξε- verbs are lexicalized. Ξεχνώ means “forget,” but current speakers do not freely derive its meaning by subtracting a transparent verb χνώ. Likewise intensive/completive ξε- in ξεπερνάω is owned by the prefixes page, not by the reversative rule.
Formal category negation with μη
In (formal/official/technical) language, invariant μη can negate a noun or adjective category: μη κυβερνητικός “non-governmental,” μη καπνιστής “non-smoker,” μη αναστρέψιμος “non-reversible.” These constructions are normally written as separate words. This is not the sound-conditioned preverbal μη/μην of prohibitions.
Η έκθεση συντάχθηκε από μια μη κυβερνητική οργάνωση.
i ékthesi sindáchthike apó mia mi kivernitikí orghánosi.
The report was prepared by a non-governmental organization. (formal)
Το εστιατόριο διαθέτει ξεχωριστό χώρο για μη καπνιστές.
to estiatório dhiathéti ksechoristó chóro ya mi kapnistés.
The restaurant has a separate area for non-smokers. (official-style category label)
Η βλάβη χαρακτηρίστηκε μη αναστρέψιμη από τους τεχνικούς.
i vlávi charaktirístike mi anastrépsimi apó tus technikús.
The damage was described by the technicians as irreversible. (technical)
Common Mistakes
Attaching α- to a finite verb
Privative α- creates established words; it does not replace clause negation. Inline ×αγράφω is not “I don't write.”
Δεν γράφω το μήνυμα τώρα, γιατί περιμένω περισσότερες πληροφορίες.
dhen ghráfo to mínima tóra, yatí periméno perisóteres pliroforíes.
I'm not writing the message now because I'm waiting for more information.
Reading δυσ- as simple absence
It normally contributes “bad, hard, unfavorable,” not plain “not.”
Η δυσκολία του κειμένου βρίσκεται κυρίως στο λεξιλόγιο.
i dhiskolía tu kiménu vrískete kiríos sto leksilóyio.
The text's difficulty lies mainly in its vocabulary.
Treating every ξε- verb as reversible
Many are lexical or intensive; the whole verb determines the meaning.
Τελικά ξεπέρασε τον φόβο του και μπήκε στο αεροπλάνο.
teliká ksepérase ton fóvo tu ke bíke sto aeropláno.
In the end he overcame his fear and boarded the plane.
Using formal μη as ordinary verbal negation
In a neutral indicative clause, keep δεν.
Ο Γιώργος δεν καπνίζει, γι' αυτό ζήτησε τραπέζι έξω.
o Yórghos dhen kapnízi, yaftó zítise trapézi ékso.
Giorgos does not smoke, so he asked for a table outside.
Key Takeaways
- Δεν/μη(ν) negate clauses; derivational prefixes create new words.
- Privative α-/αν- forms lexical opposites with possible stem and stress changes.
- Δυσ- means bad, hard, or unfavorable and contrasts with ευ-.
- Reversative ξε- attaches to established verbs; intensive/completive ξε- belongs to the broader prefixes page.
- Formal invariant μη builds category labels such as μη κυβερνητικός and is distinct from preverbal μη(ν).
Related Topics
- PrefixesB1 — Recognize productive everyday and learned Greek prefixes, their allomorphs, and the lexicalized meanings that resist word-for-word decoding.
- Adjectives in -ος / -η / -οA1 — The full paradigm of the largest and most regular Greek adjective class — καλός, μικρός, ψηλός, όμορφος — declined across all four cases, both numbers and all three genders, with the useful shortcut that each gender copies a noun declension you already know, plus the vocative -ε and why these adjectives keep their accent fixed where the matching nouns shift it.