The definition for periodic is "Occurring at regular intervals." Used in a sentence: The periodic innterruptions of the cuckoo clock prevented Li from concentrating. The definition for commemorate is "to mark by a ceremony.", the definition for oblivious is "Lacking awareness.", and the definition for lenient is "Mild or tolerant."

The definition for abate is "Become less in amount or intensity." Used in a sentence: Just when it seemed the rain would never stop, the storm suddenly began to abate. The definition for exception is "a case to which the rule does not apply.", the definition for obnoxious is "Highly offensive.", and the definition for appalling is "Inspiring dismay or disgust."

The definition for interminable is "Never ending, or seemingly endless." Used in a sentence: The impatient Zoe found the longwinded lecture interminable. The definition for comprehensible is "understandable.", the definition for surplus is "Excess.", and the definition for epistolary is "Contained or carried on in letters."

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 archetypal is "characteristic of the original model or perfect example.", the definition for solace is "Source of consolation.", and the definition for diffident is "Lacking self–confidence."

The definition for obnoxious is "Highly offensive." Used in a sentence: The manager asked the obnoxious diner to leave the restaurant. The definition for placebo is "an inactive substance used in medical testing.", the definition for genial is "Sympathetic, friendly.", and the definition for demean is "To lower status."