Spelling.School · How to spell
How to spell ninetieth
What it means: Coming next after the eighty-ninth.
In a sentence: It was Emma's ninetieth step in the game.
The part people get wrong
Watch for the order of ie. Often misspelled as nineteith or ninteith.
Same family: nine, nineteen, ninth, nineties, ninety-one. If you can spell one, the shared part carries to the others.
Where it comes from: Ninetieth comes from the Old English pattern of adding the ending “-eth” to number words to form ordinals, like tenth and hundredth. The base “ninety” itself goes back to Old English “nigontig,” meaning “nine tens.”
Patterns it uses: i before e?
Try spelling it
You will hear the word and a sentence. Type it and press Enter. Then four more words from the same level, so you know where you stand.
Words like this
Spelling.School is a spaced-repetition spelling practice: ten minutes a day, every word spoken aloud, every miss explained, and every word coming back just before you would forget it. Try five words without signing up.