Scottish Gaelic tìr

← Proto-Celtic *tīros (inherited)

← Proto-Indo-European *ters- (derived)

← Old Irish tír (inherited)

→ Scottish Gaelic muir-thìreach (affix)

→ Scottish Gaelic àrd-thìr (prefix)

→ Scottish Gaelic eilthireach (affix)

→ Scottish Gaelic eilthireachd (suffix)