Verb
(idiomatic, chiefly in the negative, with can't/cannot) To understand even minimally.
Antonyms: make head nor tail of, make neither head nor tail of
See if you can make head or tail of the last section in this chapter. I'm baffled.
He was unable to make head or tail of some of the pattern-solving puzzles in the IQ test.
To determine to be good or bad.
Source: en.wiktionary.orgAs for the commercial business, I can no longer make head or tail of it. At one moment crisis seems imminent and the City prostrated, the next everything is set fair. I know that none of this will have any impact on the catastrophe. Karl Marx
It is a queer and fantastic world. Why can't people have what they want? The things were all there to content everybody; yet everybody has got the wrong thing. Perhaps you can make head or tail of it; it is beyond me. Ford Madox Ford