Antonyms using a prefix An antonym is a word opposite in meaning to another word. A prefix is a word or letter placed before a word to change its meaning. By adding the prefix, "un", to happy, it becomes unhappy. Word wall: antonyms using a prefix continue discontinue legal illegal patient impatient complete incomplete regular irregular available unavailable likely unlikely social antisocial Can you think of other examples? Antonyms using a prefix Adding the prefix, "anti": clockwise becomes, anticlockwise Adding the prefix, "in": complete becomes, incomplete Adding the prefix, "dis": order becomes, disorder Adding the prefix, "ir": relevant becomes, irrelevant Adding the prefix, "im": mobile becomes, immobile Adding the prefix, "il": legal becomes, illegal Adding the prefix, "un", to available, it becomes unavailable
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