deficient
lacking / inadequate
Adjective
comp: more deficientsup: most deficient
Carries a clinical or technical tone. It suggests an objective gap between what is present and what is required for optimal function or legality. When applied to health (e.g., vitamins), it describes a biological shortfall. When applied to systems or performance, it implies a failure to meet a benchmark, often carrying a negative judgment of incompetence or negligence. Unlike "lacking," which can be neutral or descriptive, "deficient" often implies that the absence is problematic or harmful. It is more formal than "not enough" and more precise than "poor."
💬Casual Conversation
🎬Tuesday afternoon, Chloe is at the campus health clinic waiting for results.
Chloe Smith
Doc says I'm iron deficient. No wonder I've been crashing lately.
Ryan
Damn that's crazy. Just eat some spinach lol.
💡
Chloe uses 'crashing' as slang for feeling sudden, extreme exhaustion. Ryan's response reflects his oblivious personality by dismissing a medical diagnosis with a cliché suggestion and a low-effort phrase ('damn that's crazy').