The term 'be obliged' is a phrase that means to be required or obligated to do something. The crossword solutions for this term are MUST (4 letters), OWE (3 letters), and OWED (4 letters). MUST is an auxiliary verb that expresses obligation, necessity, or duty. OWE is a verb that means to be under an obligation to pay or repay someone or something. OWED is the past tense of OWE, meaning to have been under an obligation to pay or repay someone or something.