Early Quenya
kama-
verb. to lie down; (c. loc.) to endure, suffer
kalla
noun. helmet
kasien
noun. helmet
kasqar(in)
noun. helmet
There are more words but they are from Tolkien's earlier conceptional periods. Tolkien likely changed these words as he evolved the aesthetics and completeness of the languages. You may even find languages that Tolkien later rejected. Do not mix words from different time periods unless you are familiar with the phonetic developments.
Below: Tolkien's Late Period (1950–1973). These are from Tolkien's late conceptual period — his most settled forms of the languages. Prefer these over the earlier ones above when composing new text.
A verb appearing in the Qenya Lexicon as ᴱQ. kama- “to lie down” with a transitive variant ᴱQ. kamu- “to lay down, bend down, reduce”, both under the early root ᴱ√KAMA “lie down” (QL/44). Combined with the locative, the intransitive kama- also meant “to endure, suffer”.
Neo-Quenya: For purposes of Neo-Quenya, I would update these verbs to ᴺQ. cainu- “lie down, bend down” based on the primitive inceptive verb ✶kainu- “lie down” from the early 1950s (PE22/136). I would further assume that like its earlier variant it meant “endure, suffer (from)” in combination with the locative: cainunen soiciesse “I suffered from/endured thirst, (lit.) I bent down in thirst”.