premature

/pɹɪmət‍ʃˈɔː/

/ˌpɹiməˈtʃʊɹ/

premature

(of a baby) born before completing the normal full-term pregnancy length

antonyms : full-term

uncommonly early or before the expected time

synonyms : untimely

too soon or too hasty

Examples

1. Alex's genetics make him prone to premature aging, and he often looks like he's on the wrong side of sixty, even though he's in his fifties.

2. That one was premature.

3. My baby was premature.

4. Any talk of Napoleon’s defeat in late February was premature.