Phrase guide

not if, but when

adv · 1 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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1

adv

Meaning 1

Inevitably.

Definition source: English Wiktionary via Wiktextract

Usage: not-comparable

Examples

  • Not if, but when your files eventually get corrupted, you'll turn into the kind that makes back-ups.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

Used as an intensifier when a scenario is considered extremely likely, such that if (implying low likelihood) is not sufficient to represent its probability of occurrence. (Whereas if implies only possibility, when implies certainty, where only the time that something happens is unknown.)