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implausible

im·plau·si·ble

implausible

 
 
pronunciation:
Im plaw z bl
features:
Word Parts
part of speech: adjective
definition: hard to believe or credit.
That the school bus driver had failed to stop for her seemed to her teacher an implausible excuse for lateness.
antonyms:
believable, convincing, credible, feasible, plausible
derivation: implausibly (adv.)
Word Parts  About this feature
The word implausible contains the following parts:
im-2 Latin prefix that means not, without
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The prefix im-2 occurs in Latin loanwords. It is an assimilated form of in-2 used before roots beginning with the letter "m," "p," and "b." See in-2.
-able, -ible, -ble Latin adjective-forming suffix that means capable of being, doing, or undergoing
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The suffix -able , and its variants, is attached to Latin verb roots or English transitive verbs to form adjectives. (In a small set of cases, -able is attached to a noun, e.g. knowledgeable and marriageable.) For spelling purposes, it is useful to know that -able is more likely to be added to a whole English word (comparable, adorable ), while -ible is more likely to follow a bound root (visible , legible ). However,there are still many words which combine a root with -able (capable , inevitable ). The suffix -ity can be added to any adjective ending in -able , -ible , -ble to produce a corresponding noun ending in -ability, -ibility, -bility (possible + -ity > possibility; irrevocable + -ity > irrevocability.)