noun
fingernail
Refers specifically to a fingernail, often with a nuance of being natural or unadorned. The prefix 生 (なま) can imply 'raw' or 'natural', distinguishing it from artificial nails.
生爪が伸びてきたので切らなければ。
My fingernails have grown, so I need to cut them.
生爪を噛む癖がある。
I have a habit of biting my fingernails.