alter [altered, altering, alters](to change the form or structure of) verb [UK: ˈɔːl.tə(r)] [US: ˈɒl.tər]This coat must be altered. = Este abrigo debería ser modificado.
change [changed, changing, changes](to make something into something else) verb [UK: tʃeɪndʒ] [US: ˈtʃeɪndʒ]The law was changed. = La ley fue modificada.
modify [modified, modifying, modifies](to change part of) verb [UK: ˈmɒ.dɪ.faɪ] [US: ˈmɑː.də.ˌfaɪ]I'm a genetically modified organism. = Soy un organismo genéticamente modificado.