Words ending in -efy and -ify

Most verbs of this type end with -ify. Some of the most familiar are listed here:

rectify; intensify; justify; beautify; certify; modify; signify; clarify; mystify; simplify; classify; amplify; exemplify; falsify; notify; specify; pacify; glorify; purify; qualify; unify; fortify; testify; identify; terrify; diversify; verify; horrify; ratify.

There are only four common verbs that end in -efy:

liquefy; putrefy; rarefy; stupefy.


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Grammar and usage