The past participle of the past struggle and the present participle of the struggle span the third person singular span nouns span adverbs.
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make arduous efforts
intransitive verb
1. strive, try one's best, struggle: Example: He tried to make himself narcissistic.
He tried his best to make himself understood. Strive for success
Strive for success. I'm trying to explain.
I tried to give a detailed explanation. 3. Struggle, competition: Example: Strictly oppose differences
Fight against difficulties. 4. resist: for example, fight against fate
She likes arguing with me.
She always likes to argue with me. 5. [Obsolete] Debate; assort or arrange in pairs or groups ...