To Strive (or Striveth)
(in a good way), means,
To make efforts; to labor hard; to exert the powers of the body or mind earnestly; try hard to win.

To Strive
(in a bad way), means,
to quarrel;
to dispute; to fight.

Strive to enter in at the straight gate;
for many, I say unto you, will seek to enter in, and shall not be able.
Luke 13:24

...And the servant of the Lord
must not strive;
but be gentle unto all men,
apt to teach, patient...

2Tim 2:24