caila ("k")adj.(and noun???) "lying in bed, bedridden, sickness" (KAY, VT45:19). It may be that the gloss "sickness" applies only to the "Noldorin"/Sindarin form cael listed before Quenya caila, since cael could be both an adjective and a noun (the ancient adjective kailā "bedridden" merging with the noun kailē "sickness"). In Quenya the form caila < *_kailā _would probably be an adjective only.
Quenya
caimassë
lying in bed, sickness
caila
lying in bed, bedridden, sickness
caimassë ("k")noun "lying in bed, sickness" (KAY)