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 'lean on'. lean on or lean upon. 1. phrasal verb. If you lean on someone or lean upon them, you depend on them for support and encouragement. She leaned on him to help her to solve her problems. Synonyms: depend on, trust, rely on, cling to More Synonyms of lean on. 2. phrasal verb.