كَيْس prudence in Arabic
كَيْس is how you say “prudence” in Arabic.
Root ك ي س k-y-s. noun (verbal noun / maṣdar of Form I كَاسَ). kays.
Arabic
English
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Meaning of prudence in Arabic
- acuteness or sharpness of intellect; shrewdness, cleverness, intelligence given as the opposite of ḥumq (stupidity); glossed by lexicographers as ẓarf, fiṭna, ʿaql — quick-wittedness
- prudence, good sense the general English gloss for this word — the practical, sound-judgment side of the same acuteness
- gentleness, moderation, calmness in conducting an affair from the phrase kāsa fī l-amr, 'he acted with kays in the matter'
Example sentence
لا تجزع من كأس زلل كانت سبب كيسك،
Do not despair from a cup of slip that was the cause of your prudence.
كَيْسِكَ of your prudence
kays means 'good sense, prudence'; the ending '-ka' adds 'your' — 'of your prudence'.
The English is machine-translated.

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How it is used
Kays is the abstract noun naming the quality itself — sharp-mindedness paired with good, gentle judgment — rather than the person who has it (that word is kayyis). It is regularly set against ḥumq, 'stupidity,' as its direct opposite.
Words from the same root
- كَاسَ to be/become acute, sharp-witted, clever (Form I verb)
- كَيِّسٌ clever, sharp-witted, intelligent (said of a person)
- كِيسٌ purse, money-bag (said to 'comprise' its contents)
- أَكْيَسَ to beget/bear children of sharp intellect (Form IV)
- كَايَسَ to vie with someone in cleverness (Form III)
- تَكَيَّسَ to affect or feign cleverness (Form V)
Common questions
- How do you say "prudence" in Arabic?
- كَيْس (kays) — it denotes sharpness of intellect and sound, gentle judgment.
- What does the root ك ي س mean?
- It carries the sense of being sharp or quick in intellect; كَيِّس (kayyis) is 'clever,' and كَاسَ (kāsa) is the verb 'to be clever.'
Related words
Definitions summarised from Lane's Arabic-English Lexicon (E. W. Lane, 1863–1893).