nidan verb (lower class) with 'su' ending (archaic), intransitive verb
Archaic intransitive verb meaning to disappear or fade away. Modern Japanese uses 失せる (うせる) for this sense.
See also: 失せる
In classical texts, 失す was used to mean 'to disappear'.
nidan verb (lower class) with 'su' ending (archaic), intransitive verb
Archaic euphemism for dying, similar to 'pass away'. Not used in modern Japanese; 失せる (うせる) can carry a similar nuance in rough speech.
In old language, 失す could be used derogatorily to mean 'go' or 'come'.
In classical Japanese, 失す was used as a euphemism for 'to die'.