masterbate
Masterbate (verb) means a common misspelling of masturbate, meaning to stimulate one's own genitals for sexual pleasure, usually to orgasm. The correct spelling has no r in the first syllable: mas-tur-bate.
How to use masterbate
Learner’s notesIn plain EnglishTouching your own genitals for sexual pleasure. The word is properly spelt masturbate.
Masterbate is a misspelling and should not be used in writing. The correct forms are masturbate (verb), masturbation (noun) and masturbatory (adjective).
Remember the middle syllable is tur, as in turn, not ter. The same slip produces masterbation for masturbation.
Trace the full origin ↓Etymology
Masturbate comes from Latin masturbari, of uncertain formation; the traditional analysis links it to manus, hand, though this is not settled. The variant masterbate is not a separate word but a spelling influenced by the familiar English word master.