How to spell necessary
necessary
Not neccessary or necesary.
The trap
The word necessary has one C and two Ss, and neccessary puts the double in the wrong half of the word. The doubling is real; it belongs to the S, not the C.
Not every consonant doubles. A double is there for a reason: often an added ending, sometimes the word's history. Where neither applies, the letter stays single.
What it means
adjective. Required to be done or present.
Other words with this trap
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Play today's Daily FiveSpellingIQ is a skill rating for spelling ability, not a clinical or psychometric IQ measure. American English is canonical; common variants are accepted.