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Semitic Etymological Database
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Geez
ˁazzaza - to be strong, steadfast, vigorous
(CGD 81)
Reconstruction
PWS
*ˁzz
- to be strong
(Kogan 2015: 425 note 1220)
An eventual connection with Akk.
ezēzu
‘to be fierce’ is possible, but far from certain because of the semantic difference (Kogan 2015: 426)