expression, suru verb (special)
kick; give a kick
Literal physical kicking; often used in contexts of violence or rough treatment.
彼は怒って相手を足蹴にした。
He got angry and kicked the other person.
expression, suru verb (special)
treat poorly; walk all over; trample on
Figurative use: treating someone with contempt, ignoring their feelings, or exploiting them.
彼は部下を足蹴にするような上司だ。
He's the kind of boss who walks all over his subordinates.
人の好意を足蹴にしてはいけない。
You shouldn't trample on people's kindness.