premature
/ˌpreməˈtjʊə(r)/adjective
1- occurring or done before the usual or proper time; too early比正常时间早的; 提早的, 过早的：
the sun can cause premature ageing
阳光能导致未老先衰
with infinitive it would be premature to do so at this stage在现阶段这样做恐怕为时过早。
1.1
- (of a baby) born before the end of the full term of gestation, especially three or more weeks before（婴儿）（尤指提前三周以上）早产的, 早产儿的。
派生词
prematurely
adverb少白头。
prematurity
noun词源
late Middle English （in the sense 'ripe， mature'）： from Latin praematurus 'very early'， from prae 'before'+maturus 'ripe'.