Hebrew

yšn - to grow old (HALOT 448)

PC
*yṯn - to wear out, grow old (Ginsberg 1970:103, Kogan 2015: 316)
Origin uncertain. Comparison with Arb. ˀsn ‘to be altered, long standing, rancid (water)’ and snn (IV) ‘to be advanced in age’ suggested in Tropper 2000:109, albeit semantically attractive, is undermined by the irregular phonological correspondence. DRS 658 compares Arb. ṯnn (IV) ‘to become wasted and worn out (an old man),’ ṯinn- ‘dry herbage’. Cf. also Arb. wṯn (X) ‘to become numerous, abundant’ (Kogan 2015: 316)