yebhuyya : [adj.] numerous; most; abundant.

A.P. Buddhadatta Mahathera, Concise Pali-English and English-Pali Dictionary [available as digital version from Metta Net, Sri Lanka]

Yebhuyya (adj.) [ye=yad in Māgadhī form; thus yad bhūya=yad bhiyya "what is more or most(ly)"] abundant, numerous, most. Not found as adj. by itself, except in phrase yebhuyya -- vasena mostly, as a rule ThA 51 and PvA 136, which is identical with the usual instr. yebhuyyena occurring as adv. "as according to most," i. e. (1) almost all, altogether, practically (as in our phrase "practically dead"), mostly Di.105 (addasā dvattiŋsa lakkhanāṇi y. ṭhapetvā dve: all except two)=109; Vin iii.29 sq.; J i.246 (gāmako y. andha -- bāla -- manussehi yeva ussanno the village was peopled by mostly foolish folk); v.335 (y. asīti -- mahātherā, altogether). -- (2) as it happens (or happened), usually, occasionally, as a rule, ordinarily D i.17 (saŋvaṭṭamāne loke y. [as a rule] sattā Ābhassarasaŋvaṭṭanikā honti; expld by half allegorical, half popular etym. at DA i.110 as follows: "ye upari Brahma -- lokesu vā Āruppesu vā nibbattanti, tadavasese sandhāya vuttaŋ"); D ii.139: yebhuyyena dasasu loka -- dhātusu devatā sannipatitā (as a rule); Sn p. 107 (=bahukāni SnA 451); Miln 6 (y. Himavantam eva gacchanti: usually); DA i.280 (ordinarily); VvA 234 (occasionally), 246 (pihita -- dvāram eva hoti: usually); PvA 2 (Sattari tattha tattha viharante y. tāya tāya atth' uppattiyā), 46 (tassā kesa -- sobhaŋ disvā taruṇa -- janā y. tattha paṭibaddha -- cittā adesuŋ invariably). -- na yebhuyyena not as a rule, usually not (at all): nâpi y. ruditena kāci attha -- siddhi PvA 63.

Pali-English Dictionary, TW Rhys Davids, William Stede,