The definition for dubious is "Questionable." Used in a sentence: Karl found Kevin's claim that he was sick dubious, as he had just seen him playing football. The definition for derelict is "abandoned.", the definition for corroborate is "To support with evidence.", and the definition for combustion is "Act of burning."

The definition for avian is "Relating to birds." Used in a sentence: The old man affectionately referred to pigeons as his "avian friends." The definition for distortion is "the act of twisting out of shape.", the definition for parity is "Equality.", and the definition for refurbish is "To brighten or freshen."

The definition for precept is "A general rule of action." Used in a sentence: All the students know Mrs. Brown's strict precept; no talking in class. The definition for inauspicious is "not favorable.", the definition for intricate is "Having complex and interrelated parts.", and the definition for illuminate is "To make clear."

The definition for stern is "Harsh, severe." Used in a sentence: The stern principal canceled the prom after the seniors played a silly prank. The definition for straddle is "to favor opposing sides.", the definition for futile is "Without purpose, completely ineffective.", and the definition for conduit is "Means for transmitting or distributing."

The definition for incisive is "Impressively direct and decisive." Used in a sentence: Samir's incisive leadership made him the natural choice for president of the company. The definition for inflammatory is "tending to excite anger.", the definition for fidelity is "State of being faithful.", and the definition for extant is "Currently existing."