PES

*fṭn - to be fast (CDG 171; Kogan 2015: 459)

The origin of Proto-EthS *fṭn ‘to be fast’ is uncertain, but Leslau may be right to connect it with Arb. fṭn ‘to be intelligent, sagacious’ (Lane 2418).

Geez
faṭana - to be fast, swift, to hurry (CDG 171)
Tigrinya
fäṭänä - to be rapid (TED 2732)
Amharic
fäṭṭänä - to be fast (AED 2343)
Harari
fäṭänä - to be fast (EDH 250)
Soddo
fäṭṭänä - to be fast (EDG 250)