halve

transitive verb halved, halving

1. to divide into two equal parts
2. to share (something) equally with someone: to halve one's winnings with another
3. to reduce by fifty percent; reduce to half
4. Carpentry to join (two pieces of wood) by cutting away an end of each to half its thickness and fitting the cut ends together
5. Golf to play (a hole, match, etc.) in the same number of strokes as one's opponent