The term 'Big Foot Relative' can be summarized by the crossword solution of YETI, which is a four letter word. The YETI, also known as the Abominable Snowman, is a mythical creature said to inhabit the Himalayan region of Nepal and Tibet. It is described as an ape-like creature that stands between 6 and 10 feet tall and is covered in white fur. The YETI is believed to be a relative of the Big Foot, a cryptid said to inhabit the forests of North America.