be‧half S3 W3 AC / bɪhɑf $ bɪhæf / 名词

on behalf of somebody ( also in behalf of somebody American English )

a) instead of someone, or as their representative :

She asked the doctor to speak to her parents on her behalf.

On behalf of everyone here, may I wish you a very happy retirement.

b) because of or for someone :

Oh, don’t go to any trouble on my behalf.