Left-hand (adjective)

1. Located on the left side.
2. Relating to or intended for use by the left hand.

Origin:

From old english 'lyft-hand' meaning 'the hand on the left side'.

Examples:

1. The left-hand door was locked and couldn't be opened.
2. The left-hand glove was missing and the golfer had to play with only one glove.
3. The left-hand lane was closed for maintenance and the traffic was redirected to the right-hand lane.
4. The left-hand part of the equation was solved and the right-hand part was still unknown.
5. The left-hand turn signal was flashing and the car was ready to turn left.