संस्‍कृतशब्‍दकोशः

Monier–Williams

अप्तुर् — {aptúr} (only acc. sg. and pl. {úram} and {úrac}), m. (fr. 1. {áp} + √{tvar}), active, busy (said of the Aśvins, of Soma, of Agni, of Indra) RV