In hindi/sanskrit we have a concept called sandhi (संधि) i.e. summation of two words in one. we will break(सन्धि विच्छेद) the words under consideration to constituent original separate words. śākāhārī - शाकाहारी mānsāhārī - मांसाहारी शाकाहारी - शाक + आहारी shaak + aahaari शाक shaak means - vegetation, vegetable - relating to plants आहार aahaar - diet आहारी aahaari - means "aahaar lene wala" eater/consumer. one whos diet/food is "vegetation" - shaakaahaari or plant eater on the other hand मांसाहारी - मांस + आहारी maansaahaari - maans + aahari मांस - meat one whos diet/food is "maans" - maansaahaari or meat eater. by conext I guess u can figure out what śākāhār & mānsāhār would mean śākāhār शाकाहार - शाक + आहार -> plant (based) diet mānsāhār मांसाहार - मांस + आहार -> meat (based) diet