infant
US /ˈɪn.fənt/
UK /ˈɪn.fənt/

1.
嬰兒的, 初期的, 未成熟的
of or relating to an infant; in an early stage of development
:
•
The company is still in its infant stages.
該公司仍處於初期階段。
•
He has an infant understanding of the complex topic.
他對這個複雜的話題只有初步的理解。