The term 'over your head' is a phrase used to describe something that is too difficult to understand or comprehend. The three crossword solutions for this phrase are AIRBORNE (8 letters), ABOVE (5 letters), and ALOFT (5 letters). AIRBORNE means to be in the air, usually referring to an aircraft or other flying object. ABOVE is a preposition meaning higher than something else. ALOFT is an adverb meaning high up in the air. All three words can be used to describe something that is over one's head, figuratively or literally.