half; cutting in two; splitting into two
Refers to the act of dividing something into two equal or roughly equal parts, or the resulting halves. Often used for food, objects, or abstract divisions.
We cut the watermelon in half and ate it together.
This bread is easier to eat if you split it in two.
Compound of 二つ (ふたつ, 'two') + 割り (わり, 'split, divide'), the continuative form of 割る (わる, 'to split').