Aggravator

/ˈæɡrəˌveɪtər/ noun

A person or thing that makes a situation worse or more annoying.

From 'aggravate' plus the agent suffix '-or' (one who does). The -or suffix specifically marks something that performs an action.

📖 Full word page — etymology, 47 translations, audio 🔑 Get Free API Key — 50 lookups/day 📚 Read the Docs — integrate Word Orb