William Dwight Whitney,
Sanskrit Grammar
(This republication 1950, original 1889)
“ The infinitives (968 ff.) attach themselves only in sporadic instances to tense-stems, and even from conjugation-stems are made but sparingly earlier; and the same is true of the gerundives. b. General adjectives and nouns are somewhat widely made from conjugation-stems, especially from the base of causative conjugation: see below the suffixes a (1148 j, k) , ā (1149 c, d) , ana (1150 m) , as (1151 f) , ani (1159 b) , u (1178 g–i) , ti (1157 g) , tṛ (1182 e) , tnu (1196 b) , snu (1194 b) , uka (1180 d) , āku (1181 d) , ālu (1192 b) , tu (1161 d) . ”
