improve

As a verb improve is

(lb) to make (something) better; to increase the value or productivity (of something).

As verbs the difference between sharpen and improve

is that sharpen is to make sharp while improve is to make (something) better; to increase the value or productivity (of something).

Improve is a related term of ripen.

As verbs the difference between improve and ripen

is that improve is (lb) to make (something) better; to increase the value or productivity (of something) while ripen is to grow ripe; to become mature, as in botany: grain, fruit, flowers, and the like;.

As verbs the difference between instruct and improve

is that instruct is (label) to teach by giving instructions while improve is (lb) to make (something) better; to increase the value or productivity (of something).

As a noun instruct

is (label) instruction.

As an adjective instruct

is (label) arranged; furnished; provided.

Heighten is a synonym of improve.

As verbs the difference between improve and heighten

is that improve is to make (something) better; to increase the value or productivity (of something) while heighten is to make high; to raise higher; to elevate.

As verbs the difference between improve and cultivate

is that improve is to make (something) better; to increase the value or productivity (of something) while cultivate is to grow plants, notably crops.

As a verb improve is

(lb) to make (something) better; to increase the value or productivity (of something).

As verbs the difference between enrapture and improve

is that enrapture is to fill with great delight or joy; to fascinate while improve is to make (something) better; to increase the value or productivity (of something).

As a verb improve

is (lb) to make (something) better; to increase the value or productivity (of something).

As a noun health is

the state of being free from physical or psychological disease, illness, or malfunction; wellness.