present 3 singular
Āvuso (vocative plural masculine) [a contracted form of āyusmanto plural of āyusman, of which the regular Pāli form is āyasmant, with v for y as frequently in Pāli, e.g. āvudha for āyudha] — friend, a form of polite address "friend, brother, Sir", usually in conversation between bhikkhus. The grammatical construction is with the plural of the verb, like bhavaṃ and bhavanto. — Vin II 302; D I 151, 157; II 8; Pj II 227; Dhp-a I 9; II 93; Pv-a 12, 13, 38, 208.
respectful term of address, used by and to non-Buddhists, and by bhikkhus (and bhikkhunīs) to lay-followers, and to each other. Not used by or to the Buddha, and later used only by a senior bhikkhu to a junior
【無，呼】 朋友，兄弟（出家人之間禮貌上的稱呼）。
(ind, ind, voc sg & pl) sir; sirs; venerable; venerables; reverend; reverends friend, brother Construction: ā + √i > ay + *as + mant + o āyasmanto > āyas(mant)o > āvuso