The term 'Prone to Pranks' can be described by two crossword solutions, 'ELFISH' and 'IMPISH'. ELFISH is an adjective used to describe someone who is mischievous, playful, and often naughty. It is derived from the word elf, which is a mythical creature known for its mischievous behavior. IMPISH is also an adjective used to describe someone who is mischievous and playful, but it is derived from the word imp, which is a mythical creature known for its mischievousness and trickery. Both words are used to describe someone who is prone to pranks.