Expletive (Pleonastic) Negation (până nu, fără să, teamă să nu)

Everywhere else in this group, nu negates: it flips the truth of a clause. This page is about the handful of places where nu appears but negates nothing at all — what grammarians call expletive (or pleonastic) negation. The flagship case is the fear clause: Mă tem să nu cadă does not mean "I'm afraid he won't fall" — it means "I'm afraid he will fall". The nu there is a fossil, inherited from Latin, that marks the feared, unwanted event rather than its absence. Misreading it is not a small slip; it inverts the meaning of the sentence. This is the negation-system view of a phenomenon also touched on from the mood-selection angle in advanced mood selection; here we treat it as a class of nu that breaks the normal rule, and show how to recognize every member of the class.

The Latin source: timeo ne cadat

The expletive nu is not a Romanian eccentricity; it is a direct inheritance. Latin expressed "I'm afraid he will fall" as timeo ne cadat — literally "I fear lest he fall", with the subordinator ne introducing the feared event. That ne was not a negation in meaning; it flagged "the thing I want not to happen". Romance languages preserved the construction. French still says je crains qu'il ne tombe (the famous ne explétif), and Romanian merged the old subordinator into its own subjunctive frame să + nu. So when you see să nu after a fear verb, you are looking at the Latin ne in modern dress. Understanding the etymology is the cure: the nu there means "lest", and "lest he fall" is a fear that he will.

Case 1: fear clauses (a se teme, mi-e teamă, mi-e frică)

After a verb or expression of fearing, the subjunctive complement introduced by să takes an expletive nu whenever the feared thing is a bad event you hope to avoid. The structure is: [fear verb] + să nu + [the unwanted event]. The nu marks "this is the thing I don't want to happen" — it does not deny that it might happen; on the contrary, it expresses the worry that it will.

This is sharply different from real negation, and Romanian keeps the two apart by the conjunction:

The discriminator is the conjunction, not the nu. Să nu after a fear verb is the "lest" pattern: the feared bad thing follows and is not negated. Că nu is ordinary "that … not": the nu genuinely negates. So to say you fear something good will not happen, you switch to că + indicative, where the nu recovers its normal force.

When the feared event is itself the non-occurrence of something, you may even see both: Mă tem să nu nu reușească is avoided — natives restructure to Mă tem că nu reușește ("I'm afraid he won't succeed"). The grammar steers you away from stacking the expletive on a real negation.

Case 2: warnings and "or else" (ai grijă să nu, vezi să nu)

The same expletive să nu extends to warnings — telling someone to be careful lest a bad thing happen. Ai grijă să nu cazi is "Be careful you don't fall" / "Mind you don't fall"; the nu marks the danger to be averted. English here actually has a parallel "you don't / lest" idiom, which makes this case easier than the fear clause. The purpose clause să nu ("so that … not", "in order not to") is its close, fully literal cousin — there the nu is a real negation of the purpose — so context and the matrix verb tell them apart.

In the last example the bare să nu at the start of a clause works as "or else / lest", introducing the bad outcome to be avoided. Again: the nu points at the unwanted event, it does not deny it.

Case 3: the older/regional 'until' clause (până nu)

Standard modern Romanian builds "until" with până + indicative (până vine "until he comes") or până când (până când vine). But you will encounter — in older texts, proverbs, and some regional speech — a până nu + clause that carries an expletive nu with the sense "until": Nu pleca până nu termini in older usage could be read "Don't leave until you finish", where până nu termini means "until you finish", not "until you don't finish". Here the nu is the same pleonastic ghost.

This case is genuinely tricky because până nu also has a real-negation reading "before" / "while … not yet": până nu se face întuneric = "before it gets dark" (while it is not yet dark). Honesty about the difficulty: the boundary between expletive and real nu in până (nu) clauses is debated among Romanian grammarians, and usage varies by region and register. For production, the safe, unambiguous modern choice is până / până când + indicative for "until", and reserve până nu for the set "before it happens" sense.

Case 4: the 'cât pe ce să nu' / 'era să nu' near-miss type

A final, idiomatic pocket: the "almost / nearly" constructions cât pe ce să and era să describe an event that nearly happened. With a positive event, no nu: Era să cad = "I almost fell". But you will hear an expletive-flavored nu creeping into the negative near-miss in colloquial speech, and it is easy to over-parse. The reliable forms are without the extra nu:

Common Mistakes

Reading the expletive nu in a fear clause as a real negation (the meaning-inverting error):

Dropping the expletive nu where the "lest" pattern needs it:

Using să nu where the meaning is genuinely "afraid that … NOT" (good thing failing to happen):

Building "until" with până nu in neutral modern prose:

Adding an extra nu to the "almost happened" construction:

Key Takeaways

• Expletive nu appears but negates nothing — it is roughly English "lest", inherited from Latin ne (timeo ne cadat).
• Fear clauses: să nu after a se teme / mi-e teamă / mi-e frică means "lest" — mă tem să nu cadă = "I'm afraid he will fall". Discriminate by conjunction: să nu (expletive) vs că nu (real negation).
• Warnings: ai grijă/vezi să nu … and să nu …! ("or else") use the same expletive nu pointing at the danger.
• până nu for "until" is older/regional and overlaps with the real-negation "before"; modern standard prefers până / până când
  • indicative.
• The cardinal error is reading the expletive nu literally, which flips the sentence's meaning. Test it: remove the nu and see whether the sense changes — if it doesn't, the nu was expletive.