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Scottish Gaelic -ach
Proto-Celtic *-ākos (inherited)
Welsh -og (cognate)
Scottish Gaelic -ag (doublet)
Proto-Indo-European [[*-eh₂kos]], [[*-eh₂ḱos]] (inherited)
Proto-Indo-European *-eh₂- (mention)
Proto-Indo-European *-kos (mention)
Proto-Indo-European *-ḱos (mention)
Old Irish -ach (inherited)

English Comrie (mention)
Welsh -og (cognate)
Irish dóchasach (affix)
Scottish Gaelic salach (affix)
Scottish Gaelic boireannach (affix)
Scottish Gaelic beathach (affix)
Scottish Gaelic gruagach (affix)
Scottish Gaelic maiseach (affix)
Scottish Gaelic cinnteach (affix)
Scottish Gaelic bòidheach (affix)
Scottish Gaelic aonaranach (affix)
Scottish Gaelic sunndach (affix)
Scottish Gaelic uabhasach (affix)
Scottish Gaelic gruamach (affix)
Scottish Gaelic cudromach (affix)
Scottish Gaelic cunnartach (affix)
Scottish Gaelic drùiseach (affix)
Scottish Gaelic -ag (doublet)
Scottish Gaelic ciontach (affix)
Scottish Gaelic sgiathach (affix)
Scottish Gaelic biorach (affix)
Scottish Gaelic òganach (affix)
Scottish Gaelic Cuimreach (affix)
Scottish Gaelic Albannach (affix)
Scottish Gaelic Manainneach (affix)
Scottish Gaelic Spàinneach (affix)
Scottish Gaelic Frangach (affix)
Scottish Gaelic àbhaisteach (affix)
Scottish Gaelic leatromach (affix)
Scottish Gaelic làireach (affix)
Scottish Gaelic aon-adharcach (affix)
Scottish Gaelic adharcach (affix)
Scottish Gaelic ceàrnach (affix)
Scottish Gaelic bacach (affix)
Scottish Gaelic crùbach (affix)
Scottish Gaelic adhartach (affix)
Scottish Gaelic eagalach (affix)
Scottish Gaelic brònach (affix)
Scottish Gaelic ceàrdach (affix)
Scottish Gaelic tuathanach (affix)
Scottish Gaelic feòil-itheach (affix)