suffix, adverb
despite being ...; unbecoming of ...; in a way uncharacteristic of ...
Attaches to nouns (often 女, 男, 子供, 学生, etc.) to express that an action is inappropriate or unexpected for that role or status. Most commonly seen as 女だてらに. Carries a critical or old-fashioned tone.
女だてらにそんな乱暴な言葉を使うものではない。
It's unbecoming of a woman to use such rough language.
子供だてらに大人の議論に口を出すなんて生意気だ。
It's impertinent for a child to butt into an adult discussion.