なく (written continuative of ない)

• Reading: なく
• Romaji: naku
• Formation: Verb ない-form stem + く / い-Adjective ～くなく / ではなく

Meaning

A continuative form of ない used in written Japanese to connect clauses, often indicating a reason, cause, or contrasting circumstance for what follows.

なく is the 連用形 (continuative form) of ない and functions as a formal, written-style clause connector meaning 'not doing X, and...' or 'because X is not the case...'. It is the negative counterpart of the く continuative. While なくて is common in spoken Japanese for both reason-giving and sequential negation, なく is preferred in formal writing, news, and academic texts. For example, 理解できなく、困った is more formal than 理解できなくて困った. The form can also appear as ～ではなく (not X, but rather Y), which is extremely common in both speech and writing for making corrections or contrasts.

Examples

1. 期限に間に合わなく、提出が遅れた。 I couldn't meet the deadline, so the submission was late.
2. 彼は反対ではなく、慎重なだけだ。 He is not opposed; he is merely being cautious.
3. 準備が十分でなく、発表に自信がなかった。 The preparation was insufficient, so I lacked confidence in the presentation.

Usage Guide

Context: written, academic, news

Tone: explanatory

Do Say

• 費用の問題ではなく、時間の問題だ。
• 十分な説明がなく、参加者は混乱した。
• 結果が出なく、方針を変更した。

Don't Say

• 天気が良くなく、楽しくなく、帰った。(Chaining multiple なく clauses sounds awkward and overly heavy) → 天気も良くなく楽しくもなかったので、帰った。
• 食べなく寝た。(なく requires a logical connection between clauses; unrelated actions should use ないで) → 食べないで寝た。

Origin & History

なく derives from the 連用形 of the classical negative auxiliary ず, which evolved into ない in modern Japanese. The く continuative preserves the formal connecting function of classical grammar.

Cultural Context

Generation: All ages

Social background: Universal