i-adjective
Rare adjective describing a person or remark that is deliberately hurtful or malicious, often with a sense of passive-aggressive spite. The word is uncommon and may be encountered mainly in older or literary contexts.
彼の面当てがましい言い方に、みんなが傷ついた。
Everyone was hurt by his spiteful way of speaking.
あの人の面当てがましい態度には我慢できない。
I can't stand that person's snide attitude.