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 dubious is "questionable.", the definition for perception is "Capacity for seeing or understanding.", and the definition for incumbent is "Necessary as a duty or responsibility."

The definition for elusive is "Hard to grasp." Used in a sentence: The words to the song are elusive, as the singer tends to mumble. The definition for implausible is "unbelievable.", the definition for pretentious is "Making unjustified claims.", and the definition for futile is "Without purpose, completely ineffective."

The definition for fickle is "Lacking constancy, changeable." Used in a sentence: The fickle Senji had a new best friend every month. The definition for periodic is "occurring at regular intervals.", the definition for derelict is "Abandoned.", and the definition for inflammatory is "Tending to excite anger."

The definition for unscrupulous is "Lacking principles." Used in a sentence: The unscrupulous salesman was fired for lying to his customers. The definition for mandate is "an official order or commission to do something.", the definition for pomp is "Showy display.", and the definition for interminable is "Never ending, or seemingly endless."

The definition for accommodate is "To give consideration to." Used in a sentence: The hospitable couple was happy to accommodate the needs of their finicky guest. The definition for exception is "a case to which the rule does not apply.", the definition for straddle is "To favor opposing sides.", and the definition for placebo is "An inactive substance used in medical testing."