sharpen vs soften

sharpen and soften both are verbs.

Word	Noun	Adjective	Verb	Adverb
sharpen	No	No	Yes	No
soften	No	No	Yes	No

sharpen (verb)	soften (verb)
become sharp or sharper	become soft or softer
make crisp or more crisp and precise	make soft or softer
raise the pitch of (musical notes)	lessen in force or effect
put (an image) into focus	make less severe or harsh
make (one's senses) more acute	protect from impact
give a point to	make (images or sounds) soft or softer
make sharp or sharper	give in, as to influence or pressure
make (images or sounds) sharp or sharper