weaken vs subside

weaken and subside both are verbs.

Word	Noun	Adjective	Verb	Adverb
weaken	No	No	Yes	No
subside	No	No	Yes	No

As verbs, subside is a hyponym of weaken; that is, subside is a word with a more specific, narrower meaning than weaken:

weaken (verb)	subside (verb)
become weaker	wear off or die down
lessen the strength of	sink down or precipitate
reduce the level or intensity or size or scope of	sink to a lower level or form a depression
lessen in force or effect	descend into or as if into some soft substance or place
destroy property or hinder normal operations