to cause something to become greater in number or quantity

gather or amass something

to press or clasp (something) firmly together

grasp

to collect (information) and arranged in (a book, list, report etc)

assemble, accumulate

to make (e.g. a blood vessel) tight or smaller

inhibit

a flat, stitched fold of cloth; (GB informal) food, especially the cakes, pastry etc that children enjoy; to push, fold, (something) into a small space

fold together