The definition for diffident is "Lacking self–confidence." Used in a sentence: The diffident student never raised her hand in class, even when she knew the answer. The definition for mundane is "practical, ordinary.", the definition for implausible is "Unbelievable.", and the definition for conduit is "Means for transmitting or distributing."

The definition for buffer is "Protective barrier." Used in a sentence: The dense trees acted as a buffer against the heavy rain. The definition for distortion is "the act of twisting out of shape.", the definition for refurbish is "To brighten or freshen.", and the definition for revoke is "To cancel by taking back."

The definition for deferment is "The act of delaying." Used in a sentence: Sybil was frustrated by the deferment of her much anticipated vacation. The definition for incongruous is "not harmonious, incompatible.", the definition for salvage is "To save from ruin.", and the definition for indecorous is "In bad taste."

The definition for turpitude is "Essential baseness, depravity." Used in a sentence: The turpitude of the villain in the movie offended most audiences. The definition for extol is "to praise highly.", the definition for ethical is "Conforming to accepted standards.", and the definition for colossal is "Immense, enormous."

The definition for incumbent is "Necessary as a duty or responsibility." Used in a sentence: It was incumbent on Jack to attend his father's retirement party. The definition for melodious is "having a pleasing melody.", the definition for gravity is "Importance, significance.", and the definition for fidelity is "State of being faithful."