to change the ending or form of (a word) to show its relationship to other words in a sentence; to adapt, regulate (the voice); (of a line etc) to bend inwards; curve

adjust, harmonize

to make changes in (something); make (something) different

alter, change

to adjust, adapt, the level, pitch etc of (sound)

adjust, harmonize

to make (a bed, film etc) again

convert, transform

to change the shape, appearance, quality or nature of a person, thing

change completely

to cause (two or more people, things) to change places; to put (a piece of music) into another key

swap, switch