Baptism by fire

Meaning

First experience that is particularly challenging.

Usage

Used when introducing newcomers through tough trials.

Origin & History

Origins and dates here are approximate summaries. Many idioms have disputed or unknown origins, and not every date has been checked against a historical dictionary, so treat specific dates and stories as a starting point rather than a citation.

Military initiation referencing fire-based trial.

Used since the 19th century in training contexts.