obligated

the word 'obligated' originates from the latin verb 'obligare', a compound of 'ob-' (toward, against) and 'ligare' (to bind). this literal sense of "binding toward" someone conveyed the concept of being legally or morally bound by a duty or promise. entering english via old french 'obliger', the past participle form 'obligated' evolved to describe the state of being compelled by such a bond, whether by external law or internal sense of duty. the core semantic link from the physical act of tying to a figurative binding commitment remains clear in its modern usage.

Structure: ob (toward) + lig (bind) + ated (adjective suffix) ob (latin prefix meaning "toward, against"); lig (from latin root 'ligare' meaning "to bind"); ated (latin-derived participial/adjectival suffix '-atus', indicating a state or condition)