Definition of superlative for English Language Learners. grammar : the form of an adjective or adverb that is used to indicate the greatest degree of a particular quality : the superlative form of an adjective or adverb.
The body's systems speed up and cause symptoms that are common to hyperthyroidism when thereâs a high level of thyroid hormone in the bloodstream. Symptoms include: 1  anxiety. 2  irritability. 3  fatigue. 4  hand tremors. 5  increased or irregular heartbeat.6  excessive sweating. 7  difficulty sleeping.8  diarrhea or frequent bowel movements.he body's systems speed up and cause symptoms that are common to hyperthyroidism when thereâs a high level of thyroid hormone in the bloodstream. Symptoms include: 1  anxiety. 2  irritability. 3  fatigue. 4  hand tremors. 5  increased or irregular heartbeat. 6  excessive sweating. 7  difficulty sleeping. 8  diarrhea or frequent bowel movements.
The symptoms of hyperthyroidism -- including weight loss, rapid heartbeat, insomnia, irritability, heat intolerance and a constantly âwiredâ feeling -- generally catch womenâs attention sooner than those of hypothyroidism. A common cause of hyperthyroidism is Gravesâ disease, an autoimmune disorder of the thyroid.An underactive thyroid, called hypothyroidism, however, is a whole different story. âThe symptoms are usually mild and non-specific, so itâs easy to attribute them to many other things... common cause of hyperthyroidism is Gravesâ disease, an autoimmune disorder of the thyroid. An underactive thyroid, called hypothyroidism, however, is a whole different story. âThe symptoms are usually mild and non-specific, so itâs easy to attribute them to many other things...