certainly / of course
As a reply on its own, or reinforced as sigur că da. Warm and ordinary, not formal.
Sigur!
Of course!
Sigur că da.
Yes, of course.
#95 · Adverb
sigur
In Romanian, sigur means “certainly / of course”. It’s the #95 most frequently used Romanian word. Below you’ll find how to use it, its forms, real example sentences, and common word pairings.
Meaning & Use
Sigur is "certainly" — and as a one-word answer it is the Romanian "Sure!" or "Of course". Rank 95. It doubles as an adjective meaning both "certain" and "safe", and there it agrees (sigur, sigură, siguri, sigure). As the adverb tagged here it never changes, and it appears constantly in two frames: sigur că da and sunt sigur că.
neutralsurely / definitely (modifying a clause)
Marks the speaker’s confidence about what follows.
Sigur vine.
He'll definitely come.
Nu sunt sigur.
I'm not sure.
sure / certain (adjective)
In sunt sigur că it agrees with the speaker: a woman says sunt sigură.
Sunt sigur că da.
I'm sure it's yes.
Ești sigură?
Are you sure?
safe (adjective)
The second adjective sense — a place or a method that carries no risk.
un loc sigur
a safe place
Forms you’ll actually hear
Ranked by how often each form shows up in spoken Romanian. The top form cover about 100% of everyday use — learn these first.
sigur100%
Patterns
As an adverb it is invariable and stands at the front of the clause it comments on, or alone as an answer. Its comparative is mai sigur and its superlative cel mai sigur, both used mainly in the "safely" sense. As an adjective it agrees fully: sigur, sigură, siguri, sigure.
Sigur! (as an answer)
The everyday "Of course" — warmer than a plain Da.
— Mă ajuți? — Sigur.
— Will you help me? — Sure.
sigur că da / sigur că nu
Reinforced yes and no.
Sigur că nu am uitat.
Of course I didn't forget.
sunt sigur că …
The adjective frame, agreeing with the speaker.
Sunt sigură că vine.
I'm sure he's coming.
sigur + verb
Marks confidence about what follows.
Sigur a plecat deja.
He's surely left already.
cel mai sigur
The superlative, mostly in the "safest" sense.
E cel mai sigur mod.
It's the safest way.
Examples
— Vii? — Sigur!
— Are you coming? — Of course!
sigur - The one-word answer, and the most common use of all. It is friendlier than a bare Da.
Sigur că da.
Yes, of course.
sigur - A fixed reinforcement. Its negative counterpart is sigur că nu, "of course not".
Sunt sigur că am dreptate.
I'm sure I'm right.
sigur - Here it is the adjective and agrees with the speaker — sunt sigură if a woman is speaking.
Nu e sigur încă.
It isn't certain yet.
sigur - The impersonal judgement stays in the masculine singular, because there is no noun to agree with.
Mergi mai sigur pe drumul ăsta.
You'll go more safely on this road.
sigur - The adverb with mai for the comparative. The invariable adverb is correct here whoever is travelling.
Sunt sigur agrees, Sigur! does not. As a reply or in front of a verb the word is an invariable adverb; inside sunt sigur / sunt sigură it is an adjective describing you, and a woman must say sigură. Both live in the same sentence often enough that the split is worth noticing early.
In expressions
Common phrases built around sigur — worth learning as whole units.
sigur că— of course; surely
lit. “sure that”
sunt sigur— I'm sure (that)
lit. “I-am sure” · agrees in gender: sunt sigură (female speaker)
Ești sigur?— Are you sure?
lit. “are-you sure” · to a woman: ești sigură?