The Proto-Semitic word ṯ̣upr
Word ṯ̣upr
Meaning fingernail

Comments
Kaye, Alan S. "Christopher Ehret. Reconstructing Proto-Afroasiatic (Proto-Afrasian): Vowels, Tone, Consonants, and Vocabulary", University of California 1995

Other words that might be of interest
*yad / ʔid ‘hand’, θ̣pr ‘nail, claw’, ɬ(a)ʕp ‘foot’, rgl ‘foot’, rkb ‘knee’, ɬp(t) ‘lip’, pay- ‘mouth’, wsm ‘to sleep’, d(a)nb ‘tail’, dam ‘blood’, tady ‘breast’, ʾudn ‘ear’, bayṣ̂ ‘egg’, ʾam(m) ‘elbow’, ʿayn ‘eye’, ṣibʿ ‘finger’, šāḳ ‘leg’, ŝaʿr ‘hair’, kapp ‘hand’, rāḥ, rīḥ ‘hand, palm’, libab ‘heart’, ḳarn ‘horn’, ŝap ‘lip’, ʾanp ‘nose’, naḫīr ‘nose, nostrils’, ʾadam, ʾadīm ‘skin’, šin ‘sleep’, lišān ‘tongue’, šinn ‘tooth’, kanap ‘wing’