The definition for opportune is "Suitable or convenient." Used in a sentence: Quan stepped onto the platform at the most opportune time, just as the train pulled in. The definition for entangle is "to involve in trouble.", the definition for augment is "To make greater.", and the definition for manifest is "Obvious."

The definition for implausible is "Unbelievable." Used in a sentence: Claudia's implausible excuse failed to convince her teacher. The definition for plaudits is "enthusiastic approval.", the definition for fraud is "Trick.", and the definition for futile is "Without purpose, completely ineffective."

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 repel is "to resist, reject.", the definition for fickle is "Lacking constancy, changeable.", and the definition for nurture is "To further the development of."

The definition for ethical is "Conforming to accepted standards." Used in a sentence: Mary did the ethical thing and turned in the diamond necklace she found. The definition for inflammatory is "tending to excite anger.", the definition for induce is "To influence or cause.", and the definition for flaw is "An imperfection."

The definition for aerate is "To supply with air." Used in a sentence: Every spring, Soloman used his tiller to aerate the compact soil. The definition for immoderate is "beyond usual or proper limits.", the definition for heinous is "Shockingly evil.", and the definition for rail is "To scold in harsh language."