This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

v. Simple past tense and past participle of participate.

"Until now, I only ever participated from the outside, and had noticed some stuff I thought wasn't very good in terms of organisation and decisions."

participated    participates    participating   

participating tone   

participle    participator    participative    participation    participial    participant    participatory   

jump   

participated    participating   

participating    partake    share    partaker   

anticipate    dissipate