How to say "fifth (ordinal, e.g. 5th)" in Arabic

Cognate

Meaningfifth (ordinal, e.g. 5th)

Arabic · Modern Standard Arabic

خَامِس

khāmisח'אמס

خامس

Hebrew · Modern Hebrew

חמישי

khamishiخَامِيشِي

How the two words are related

Cognate

Same Semitic root, same meaning — you already know this word.

Arabic root

خ-م-س

Hebrew root

ח-מ-ש

חמישי and khāmis run the same ordinal pattern over the root for 'five' — ח doing its usual double duty for خ, as in חמש/khams.

الْيَوْم الخَامِس

al-yawm al-khāmisאל-יום אל-ח'אמס

the fifth day

خَامِسَة

khāmisaח'אמסה