The definition for illuminate is "To make clear." Used in a sentence: Her excellent lecture illuminated the complicated subject of nuclear physics. The definition for demeanor is "behavior towards others.", the definition for entangle is "To involve in trouble.", and the definition for implement is "To carry out or accomplish."

The definition for commemorate is "To mark by a ceremony." Used in a sentence: Each year, the Franklins commemorate their anniversary by visiting the site of their first date. The definition for pretentious is "making unjustified claims.", the definition for beneficial is "Helpful.", and the definition for colossal is "Immense, enormous."

The definition for benefactor is "One who offers financial help." Used in a sentence: Michael's aunt and benefactor paid his college tuition. The definition for futile is "without purpose, completely ineffective.", the definition for buffer is "Protective barrier.", and the definition for stern is "Harsh, severe."

The definition for negate is "To make invalid." Used in a sentence: Paula negated Tiffany's argument by proving that her main premise was false. The definition for repentant is "feeling regret.", the definition for combustion is "Act of burning.", and the definition for clarity is "Clearness."

The definition for straddle is "To favor opposing sides." Used in a sentence: Kia straddled the issue, not wanting to say whether James or Tara was right. The definition for exasperation is "the state of being irritated.", the definition for euphoria is "Feeling of great happiness.", and the definition for archetypal is "Characteristic of the original model or perfect example."