Dictionary Definition:
Uṭṭhahati & Uṭṭhāti [ud + sthā see tiṭṭhati & uttiṭṭhati] to rise, stand up, get up, to arise, to be produced, to rouse or exert oneself, to be active, pres. uṭṭhahati Pug 51. -- pot. uṭṭhaheyya S i.217; as imper. uttiṭṭhe Dh 168 (expld. by uttiṭṭhitvā paresaŋ gharadvāre ṭhatvā DhA iii.165, cp. Vin Texts i.152). -- imper. 2nd pl. uṭṭhahatha Sn 331; 2nd sg. uṭṭhehi Pv ii.61; J iv.433. -- ppr. uṭṭhahanto M i.86; S i.217; J i.476. -- aor. uṭṭhahi J i.117; PvA 75. -- ger. uṭṭhahitvā PvA 4, 43, 55, 152, & uṭṭhāya Sn 401. -- inf. uṭṭhātuŋ J i.187. <-> Note. When uṭṭh˚ follows a word ending in a vowel, and without a pause in the sense, a v is generally prefixed for euphony, e. g. gabbho vuṭṭhāsi an embryo was produced or arose Vin ii.278; āsanā vuṭṭhāya arising from his seat, Vism 126. See also under vuṭṭhahati. -- pp. uṭṭhita; Caus. uṭṭhāpeti. -- Cp. pariyuṭṭhāti.