They were unable, they said, to accept the terms offered by Archidamus. Synonyms for hard to explain at Thesaurus.com with free online thesaurus, antonyms, and definitions. Contexts ( unable to ) Lacking the means to stop doing something or to prevent something from happening If she insisted that she was ill and unable to go back, there would be a fuss. 10 synonyms of unable from the Merriam-Webster Thesaurus, plus 18 related words, definitions, and antonyms. Top synonym for unable to explain (other word for unable to explain) is able to explain. 19 synonyms of explain from the Merriam-Webster Thesaurus, plus 25 related words, definitions, and antonyms. unable to explain synonyms - similar meaning - 20. Simply because otherwise he would be unable to realise what he had done. Unable: lacking qualities (as knowledge, skill, or ability) required to do a job. Find another word for unable. Here's a list of similar words from our thesaurus that you can use instead. Free thesaurus definition of impossible to describe or explain from the Macmillan English Dictionary - a free English dictionary online with thesaurus and with pronunciation from Macmillan Education. If we are unable to assume either … exp. Explain: to make plain or understandable. Find descriptive alternatives for hard to explain. Synonyms Antonyms Definitions Examples 3. able to explain. Find another word for explain. 2. at a loss to explain. exp. Lists.