radioactive
Translation
radioactive
Examples
Uranium is a radioactive element.
Uranium is a radioactive element.
Radioactive waste must be stored safely.
Radioactive waste must be stored safely.
Grammar Patterns
radioactive ((noun)) describing something that emits radiation. Uranium is a radioactive element.
Similar Words
Synonyms: radiating, emitting; Antonyms: stable, inert
Etymology
From 'radio-' (from Latin 'radius', 'ray') + 'active'. Literally 'active in emitting rays'.
Memory Tips
Think of it as being 'active' by sending out 'radio' waves or rays.