כשר
ka-SHER
Fit, proper — ritually or legitimately.
What does it literally mean — and what do Israelis actually mean?
What it literally means
Literal: "fit, proper."
המסעדה כשרה למהדרין, עם תעודה.Ha-mis'ada kshara le-mehadrin, im te'uda.The restaurant is strictly kosher, with a certificate.
What Israelis actually mean
Ritual fitness; and legitimacy itself.
משהו בעסקה הזאת לא כשר.Mashehu ba-iska ha-zot lo kasher.Something about this deal is not kosher.
Where did this word come from?
Biblical root כ.ש.ר "be fit, proper, succeed" (Esther 8:5 — "ve-hadavar kasher," "and the thing is proper"). Rabbinic Hebrew made it the master adjective of dietary law (kasher l'mehadrin, glatt kosher — "glatt" is Yiddish for "smooth," i.e., the lungs). Yiddish carried kosher into English (attested 1860s+); modern Hebrew uses it universally for legitimacy.
Register & social context
Dietary-ritual and universal metaphor ("kosher or not kosher" about deals and behavior). The word traveled into English via Yiddish.
Root & morphology
Root כ.ש.ר ("be fit, proper, succeed"). Family: kashrut (the dietary system), hakhshara (certification/training), kasher (fit).
Influences & contact languages
- Hebrew (עברית, Ivrit)Biblical root כ.ש.ר "be fit, proper" (Esther 8:5) — dietary application is rabbinic.
- Yiddish (ייִדיש)Yiddish kosher carried the word into English (1860s+).
Which places are associated with this word?
This word travels through people, not places — so we don't pin it.
See where it lives in the language constellationHear it in the wild
המסעדה כשרה למהדרין, עם תעודה.
Ha-mis'ada kshara le-mehadrin, im te'uda.
The restaurant is strictly kosher, with a certificate.
משהו בעסקה הזאת לא כשר.
Mashehu ba-iska ha-zot lo kasher.
Something about this deal is not kosher.
What English speakers get wrong
It's not "blessed by a rabbi" (the food isn't blessed; the process is supervised); and the metaphorical "not kosher" is fully idiomatic — not disrespectful.
What lives next to this word?
See the language constellation
Follow this word into a guided story
Sources & review
Want to use this word? Understand it inside a full sentence — Open Baba →