CLEAVE

Either:
to stick closely together/come or be in close contact with
SYN - adhere, cling

or

to split apart/ separate or cut with a sharp instrument; make by cutting into
SYN - rive, split

"As they got closer and close to the dark whole, Melinda cleaved to John."

"After the bumpy car ride the jello had been knocked over and had cleaved to the seatbelt."

"He was going to cleave 1/8 of the block of wood."

"she had asked him to cleave the countertop to make a gap for the sink."

"broaching the topic of abortion had quickily cleaved the group into two."