A word compounded of
so and
ever, used in composition with
who,
what,
where,
when,
how, etc., and indicating any out of all possible or supposable persons, things, places, times, ways, etc. It is sometimes used separate from the pronoun or adverb. [
1913 Webster]
"For unto whomsoever much is given, of him shall be much required."
[1913 Webster]
"What great thing soever a man proposed to do in his life, he should think of achieving it by fifty."
[1913 Webster]