○tapas mfn. performing long penances R. Hariv.
• m. N. of several Ṛishis (also v. l. for ○tamas) Hariv. Pur.
• ○pa-ākhyāna, and ○paḥ-svarga-gamana n. 'the story of a long penance', and 'going to heaven by long penance', N. of 2 chapters of the ŚivaP.

Sanskrit-English Dictionary, by M. Monier William