suru verb (precursor), intransitive verb
to lie down (in bed); to take to one's bed
Archaic intransitive verb, precursor to modern 臥する (がする). Used in classical Japanese to mean lying down, especially due to illness.
See also: 臥する
病に臥す。
To lie down with illness.
古典では「病に臥す」のように使われた。
In classical texts, it was used like '病に臥す' (to be bedridden with illness).
Standard modern verb for 'to lie down' or 'to sleep'. 臥す is archaic and not used in everyday speech.
Classical Japanese verb; the exact derivation is uncertain. The kanji 臥 is conventionally associated with lying down or being bedridden.