The term 'choose (for)' can be represented by two three-letter words: OPT and OPY. OPT is an abbreviation for the verb 'to OPT, ' which means to make a choice or selection from a range of options. OPY is an abbreviation for the verb 'to opine, ' which means to express an opinion or belief. Both verbs are related to the concept of choosing, as they both involve making a decision or expressing an opinion.