The Proto-Semitic word ŝap
Word ŝap
Meaning lip
Synonyms ɬp(t)

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’, pay- ‘mouth’, wsm ‘to sleep’, d(a)nb ‘tail’, dam ‘blood’, tady ‘breast’, ṯ̣upr ‘fingernail’, 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’, ʾanp ‘nose’, naḫīr ‘nose, nostrils’, ʾadam, ʾadīm ‘skin’, šin ‘sleep’, lišān ‘tongue’, šinn ‘tooth’, kanap ‘wing’