(especially in the phrases on the sick and on long-term sick) Any of various current or former benefits or allowances paid by the Government to support the sick, disabled or incapacitated.
From Middle English sik, sike, seek, seke, seok, from Old English sēoc, from Proto-West Germanic *seuk, from Proto-Germanic *seukaz (compare West Frisian siik, Dutch ziek, German siech, Norwegian Bokmål syk, Norwegian Nynorsk sjuk), Danish syg, from Proto-Indo-European *sewg-; compare Middle Irish socht, Old Armenian հիւծանիմ.