The most reliable symptom of an underactive thyroid gland is a relentless coldness in the centre of the body. What's interesting is that cold hands and feet, especially indoors or in a warm environment, are not a reliable sign of hypothyroidism.
sit on someone or something. 1. Lit. to place oneself in a sitting position on someone or something. The enormous woman knocked the crook out and sat on him until the police came. I need to sit on this chair for a minute and catch my breath. 2. Fig. to hold someone or something back; to delay someone or something. The project cannot be finished because the city council is sitting on the final approval. Ann deserves to be promoted, but the manager is sitting on her because of a disagreement.
Definition of on for Students. 1  1 : in contact with and supported by Put the books on the table. 2  2 âused to indicate means of being carried He rode on a tractor. 3  3 âused to indicate the location of something Both bedrooms are on the top floor.  4 âused to indicate the focus of a certain action He went down on his stomach. She chewed on gum.