lit. “to stand by”, to look after, to worship Pv.iii.1#18; Ja.ii.73 (ādiccaṃ = namassamāno tiṭṭhati C.); Mil.231 (ger ˚tiṭṭhitvā); Ja.v.173 (˚tiṭṭhate). pp. upaṭṭhita (q.v.).

upa + sthā, cp. upaṭṭhahati, ˚ṭṭhāti etc.