The phrase "in the doldrums" typically refers to feeling stuck or experiencing a lack of progress. Some synonyms that can be used to convey a similar sentiment include: stalled, stagnant, sluggish, lethargic, inert, dormant, dull, listless, apathetic, and lifeless. Each of these words can be used to describe a situation or a mood that feels depressing or unmotivated. Whether you are talking about a sluggish economy, a stalled project, or someone who feels lethargic and disinterested, these synonyms can help you to convey the sense of being stuck or stagnant.