The word is knelt.
They is actually not any antonym for the word kneel, because they is not word that means exactly the opposite as the word kneel.
No. Slate does not rhyme with kneel. If you mean something else, please write your question more clearly.
She'll. Heel. Steel. Creel. Feel. Keel. Teal. Meal. Wheel. Peel. Reel. Seel. Spiel. He'll. Deal.
The word that means and rhymes with cloak is "joke."
Means Kneel
The word "afraid" slant rhymes with the word "away" but means scared.
The word that rhymes with day and means sky is "gray."
The word that rhymes with angel and means free is "mangel."
The word that rhymes with "creed" and means the opposite of follow is "lead".
One word that rhymes with 'it' and means resist is 'pit'. In this instance the word 'pit' means to set in direct opposition.
The word "lean" fits your criteria as it means cool and rhymes with green.
The word that means a little wet and rhymes with "boist" is "moist."