Chewier is a word used to describe something that requires more effort to chew. Some synonyms for chewier include tougher, leathery, sinewy, stringy, rubbery, and fibrous. Tougher refers to something that is hard to chew through, while leathery suggests a tough texture similar to animal hide. Sinewy implies a chewy texture due to the presence of sinews or tendons. Stringy refers to something that has long fibers that can tangle and cause difficulty in chewing. Rubber texture becomes chewier when it's cooked for long hence becomes hard and needs lot of effort and pressure. Fibrous suggests a texture containing a lot of connective tissue that requires more effort to chew. All of these words describe something that is difficult or takes more time to eat.