strive

In obsolete terms the difference between keen and strive

is that keen is brave, courageous; bold, audacious while strive is strife; contention.

As verbs the difference between keen and strive

is that keen is to sharpen; to make cold while strive is to try to achieve a result; to make strenuous effort; to try earnestly and persistently.

As nouns the difference between keen and strive

is that keen is a prolonged wail for a deceased person while strive is an effort; a striving.

As an adjective keen

is showing a quick and ardent willingness or responsiveness, enthusiastic, eager; interested, intense.

As verbs the difference between strive and agress

is that strive is to try to achieve a result; to make strenuous effort; to try earnestly and persistently while agress is .

As a noun strive

is (obsolete) an effort; a striving.

As verbs the difference between succeed and strive

is that succeed is to follow in order; to come next after; hence, to take the place of while strive is to try to achieve a result; to make strenuous effort; to try earnestly and persistently.

As a noun strive is

an effort; a striving.

In obsolete|lang=en terms the difference between strive and invest

is that strive is (obsolete) strife; contention while invest is (obsolete) to put on (clothing).

As verbs the difference between strive and invest

is that strive is to try to achieve a result; to make strenuous effort; to try earnestly and persistently while invest is (dated) to clothe or wrap (with garments).

As nouns the difference between strive and invest

is that strive is (obsolete) an effort; a striving while invest is (meteorology) an unnamed tropical weather pattern "to investigate" for development into a significant (named) system