The term GROW MOLARS is a combination of two words, 'GROW' and 'MOLARS'. The first word, 'GROW', is a verb that means to increase in size or number. The second word, 'MOLARS', refers to the large, flat teeth located at the back of the mouth which are used for grinding food. Together, the term GROW MOLARS refers to the process of MOLARS growing in the mouth as a child develops. The six-letter solution to this crossword is TEETHE, which is a verb meaning to cut or GROW teeth.