Words

Arabic
šayˀ- - thing (Lane 1626)
Arabic
šyb - to become whitehaired, hoary (BK 1 1294, Lane 1627)
Arabic
šayb- - whiteness of the hair (BK 1 1294, Lane 1627)
Arabic
šyḫ - to grow old (Lane 1628)
Arabic
šym - to hide, to insert one thing into another, to impress (BK 1 1300, Lane 1635)
Arabic
šīm- - rat (BK 2 1300, TA 32 487)
Cf. also šayham- ‘porcupine’ (BK 1 1283, LA XII 328)
Arabic
šzr - to twist the rope, or cord, from the left (BK 1 1225, Lane 1546)
Arabic
ˀašǯaˁ - mad (BK 1 1194, Lane 1509)
Arabic
šǯr - to be intricate, complicated, intermixed (Lane 1506)
Arabic
šaǯar- - tree (Lane 1507)

Kogan 2015:42, note 108: “Can it be derived from šǯr ‘to be intricate, complicated, intermixed’, alluding to branches of a tree as interwoven, interlaced (so the Arab lexicographers quoted by Lane)?”