Plz Help me Can i use the word arbitrary (Meaning: based on whim or chance; Synonyms: random, aimless, erratic; Antonyms: arranged, planned, deliberate) to describe something I saw?

Like for example "the arbitrary figure in the woods". Can I use it like that?​

Read the excerpt below and answer the question.i ask, gentlemen, sir, what means this martial array, if its purpose be not to force us to submission? in this excerpt from his famous virginia convention speech, patrick henry employs which literary device? questiondeclarative statement