formative years

Early developmental phase

Formative years are the period of childhood and adolescence when character, abilities, and beliefs take shape.

The phrase emphasizes how experiences during this time have lasting influence: Her formative years were spent on a farm in Iowa.

Sometimes used more loosely for any period of significant development: the formative years of the republic.

Opposites
developmental stage

formative yearsadulthood

State of being grown

old age · twilight years · middle age · golden years · declining years

influence and shaping

formative yearsset in one's ways

Fixed in habits

maintenance phase

Family

years, formation, formative

Familiarity
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Used worldwide · Timeless · Abstract · Everyday, not technical · Rated G