The phrase "lying torpid" refers to being inactive or sluggish. There are several synonyms for this term, including lethargic, dormant, inert, sluggish, indolent, and listless. These terms can be used to describe a person who is feeling lazy or unmotivated, or a situation where there is low energy or activity. For example, a plant that is lying torpid could be described as dormant, while a tired person might be described as lethargic or listless. Choosing the right synonym can help to convey a specific tone or mood, depending on the context in which it is used.