How to say "tooth" in Arabic
CognateMeaningtooth
Arabic · Modern Standard Arabic
سِنّ
sinnסן
سن
Hebrew · Modern Hebrew
שן
shenشِن
How the two words are related
Cognate
Same Semitic root, same meaning — you already know this word.
Arabic root
س-ن-نHebrew root
ש-נ-נSinn is שן with the classic س↔ש swap, as in سلام/שלום. The shared root sh-n-n means 'to sharpen' — the same one in ושננתם — and Arabic sinn also means 'age'.
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In a phrase
طَبِيب الْأَسْنَان
ṭabīb al-asnānטביב אל-אסנאןthe dentist (tooth doctor)
Plural
أَسْنَان
asnānאסנאןbroken plural aCCāC — you already met it in ṭabīb al-asnān, the dentist