tapas तपस्

Definition: n. religious austerity, bodily mortification, penance, severe meditation, special observance (exempli gratia, 'for example'"sacred learning"with Brahmans,"protection of subjects"with kṣatriya-s,"giving alms to Brahmans"with vaiśya-s,"service"with śūdra-s, and"feeding upon herbs and roots"with ṛṣi-s )