borrowed from Latin cohaerēre "to stick together, be in contact with, be connected," from co- co-haerēre "to be closely attached, stick," going back to a stem *hais-, of obscure origin
verb
to hold together firmly as parts of the same mass; broadly : stick, adhere
to display cohesion of plant parts
to hold together as a mass of parts that cohere
stickadherecohereclingcleave mean to become closely attached. stick implies attachment by affixing or by being glued together. adhere is often interchangeable with stick but sometimes implies a growing together.