upajjhāya

spiritual teacher or preceptor, master. Often combd. with ācariya e.g. Vin.i.119; Mnd.350; the ācariya being only the deputy or substitute of the upajjhāya. Vin.i.45, Vin.i.53, Vin.i.62, Vin.i.120; Vin.iv.130; SN.i.185; AN.ii.66, AN.ii.78; AN.iii.69; Snp-a.346; Dhp-a.ii.93; Pv-a.55, Pv-a.60, Pv-a.230
■ A short form of upajjhāya is upajjha, found in the Vinaya, e.g. at Vin.i.94; Vin.iii.35 with f. upajjhā Vin.iv.326.

Vedic upādhyāya, upa + adhi + i, līt. “one who is gone close up to”