speak and say. Note the idiom, generally rendered "answer and say", where the first verb must always be rendered according to the context. Here "confess and say".
Syrian = an Aramaean: i.e. Jacob.
ready to perish = perishing. Gen_42:1, Gen_42:2.
mighty. Some codices, with Samaritan Pentateuch, Targum of Onkelos, The Targum of Jonathan ben Uzziel and Septuagint, read "and mighty". Note the Figure of speech Polysyndeton (App-6), thus produced.