*aiglaz

Probably from a suffix-accented zero-grade derivative of Proto-Indo-European *h₂eyḱ-, perhaps from pre-Germanic *h₂iḱ-ló-s or *h₂iḱ-tló-s (‘pointed object, shoot’); compare the related *aigin, probably from *h₂eyḱ-ént (Kroonen 2013: 9). The close IE comparanda are Ancient Greek αἶκλοι (aîkloi) (aîkloi, ‘the angles of the missile’) and αἰχμή (aikhmḗ, ‘point of a spear, spear’) < Proto-Greek *aiksmā from PIE *h₂eyḱ-sm-eh₂, and possibly Latin ĭcō (Beekes 2010: 38, 45–46; de Vaan 2008: 295; Kroonen 2013: 9). The Ancient Greek comparanda point to a *-ló- formation; without the Greek comparanda, the Proto-Germanic form could be an instrument noun formation in *-tló- (see, for instance, Kroonen (2017)). A European substrate explanation is also possible.