Deed
Act, Behavior
noun
You go somewhere for the sake of committing some deed. Is the act you plan to carry out there benevolent? Or will your behavior perhaps be… malicious?
行為 is a somewhat formal word that objectively refers to something a person does, with the focus more on the action itself than the intention behind it. It's commonly used in writing, rules, or discussions about right and wrong, like 犯罪行為 (criminal act) or 迷惑行為 (nuisance behavior).
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
不法行為
illegal act, illegal behavior
違法行為
illegal act, illegal behavior
犯罪行為
criminal act, criminal behavior
迷惑行為
nuisance behavior
行為をする
to commit an act
行為を行う
to carry out a deed
行為を禁止する
to prohibit an act, to prohibit behavior (a specific kind)
行為を防止する
to prevent an act, to prevent behavior (a specific kind)
それは裏切り行為ですよ。
That is an act of betrayal.
頭突きは危険な行為ですよ。
Headbutting is dangerous behavior.
私には彼の行為は理解できません。
I can't understand his actions.
違法行為は厳しく罰せられます。
Illegal activity will be severely punished.