Syriac

ḥeṣrā - a little finger (LSyr. 252, SL 485)

PWS
*ḫiṣr- - little finger (SED I No. 134, Kogan 2011: 224)
Connected or contaminated with Sem. *ḫṣr ‘to be short’ (on this root see e. g. [CDG 267]). Cf. a metathetic variant root probably related to the MSA forms.