Meaning

• The work involved in performing an activity; exertion.

  "It took a lot of effort to find a decent-sized, fully-furnished apartment within walking distance of the office.   He made a conscious effort to not appear affected by the stories in the paper."

• An endeavour.

  "Although he didn't win any medals, Johnson's effort at the Olympics won over many fans."

• A force acting on a body in the direction of its motion.

Meaning

• To make an effort.

• To strengthen, fortify or stimulate