[vritra-tára] masculine a worse Vritra (Rig-veda1); -túr, adjective conquering foes or Vritra, victorious (Veda, Vedic); -tû́rya, neuter conquest of foes or of Vri tra, victorious fight (Veda, Vedic); -druh, masculine foe of Vritra, epithet of Indra; (á)-putrâ, adjective feminine; also equal for having Vritra as a son, Vritra's mother (Rig-veda1); -vadha, masculine slaying of Vritra; -vi dvish, -vairin, masculine epithet of Indra; -satru, masculine the same; -hátya, neuter fight with foes or with Indra; -hán, adjective (feminine; also equal for -ghnî́) slaying foes or Vritra, victorious; masculine epithet of Indra; -hán tama, superlative most victorious, bestowing abun dant victory (Rig-veda); - ͜ ari, masculine foe of Vritra, epithet of Indra.
Source: Macdonell