續一切經音義 5.42

5.42

優婆塞（古梵語也正云鄔波索迦鄔波此云近也迦此云事也索是男聲即近事男也謂受丑戒親近承事於三寶者也）。

Layman (優婆塞: ancient Sanskrit; correctly *upāsaka*; *upa-* here means 'near'; *-ka* here means 'service'; *-sa-* is the masculine marker; thus, 'a man who serves closely', referring to one who has taken the five precepts and closely approaches and serves the Three Jewels).