The term 'WEIRDLY MYSTERIOUS' can be broken down into two words, 'WEIRDLY' and 'MYSTERIOUS'. The crossword solution for the word 'WEIRDLY' is 'EERIE', which is an adjective meaning strange or frightening. It is often used to describe a feeling of unease or fear that one experiences when in a strange or unfamiliar place. The word 'MYSTERIOUS' is used to describe something that is not easily understood or explained. Together, the two words create a phrase that describes something that is both strange and difficult to comprehend.