How to say "cup" in Arabic
CognateMeaningcup
Arabic · Modern Standard Arabic
kaʾsכאס
كأس
Hebrew · Modern Hebrew
kosكُوس
How the two words are related
Same Semitic root, same meaning — you already know this word.
Hebrew כוס and Arabic kaʾs are the same ancient cup — Hebrew smoothed the inner glottal stop into a long o, just as ראש matches رأس. The word runs through the whole Semitic family (Akkadian kāsu, Aramaic כסא), though linguists debate whether it was inherited or traveled as an early culture-word. In modern Arabic kaʾs often means a trophy — the World Cup is كأس العالم — while the everyday drinking glass in the Levant is kāse.
Learn it
On the street
How people actually say it in the spoken dialects, where it differs from the standard word.
Levantine · Palestine, Jordan, Lebanon, Syria
The everyday word for a drinking glass.
Egyptian · Cairo and the Nile Delta
A different word: kubbāya is the Cairo drinking glass.
Moroccan · Morocco — Casablanca, Rabat, Fes
Darija says kās for a drinking glass — kās d-atay, a glass of tea.
In a phrase
A cup of cold water.
Plural
broken plural CuCūC — like قَلْب→قُلُوب