crotch
US /krɑːtʃ/
UK /krɑːtʃ/

1.
the part of the human body between the legs where they join the torso
:
•
He pulled up his pants, adjusting the fabric around his crotch.
•
The seam in the crotch of the jeans ripped.
2.
the place where a tree trunk divides into two or more branches
:
•
A bird built its nest in the crotch of the old oak tree.
•
He climbed the tree, placing his foot firmly in the crotch.