Comments: Av. paradigm C (ṭomó-l,ṭóma-l). The root means both 'roof' and 'skin' in several languages: in Av. cf. Chad. ṭom, Gid. ƛ̣om, Ants. ƛ̣om / ṭom 'roof'; in Akhv. cf. N.-Akhv. ƛ̣ami 'roof', Tlan. ṭama 'skin', Ratl. ƛ̣ami 'roof; skin'. Cf. also Bagv. Kvan. ḳ́ama, Cham. Gig. am, Gad. nabu ( < *ƛ̣am-bu), Kar. Tok. amʔi. There is certainly no reason to separate forms meaning 'roof' from those meaning 'skin' ('roof of body').