Childhood

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Old English cildhād (see child, -hood).

wiktionary

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From Middle English childhode, childhod, from Old English ċildhād(“childhood”), equivalent to child +‎ -hood. Compare dialectal Dutch kindheid(“childishness”), German Low German Kinnerheid(“childhood”), and German Kindheit(“childhood”).

etymonline

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childhood (n.)

"state of being a child; period of life from birth to puberty," Old English cildhad; see child + -hood. Similar formation in German Kindheit.