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 intricate is "having complex and interrelated parts.", the definition for oblivious is "Lacking awareness.", and the definition for iridescent is "Having a lustrous or attractivve quality."

The definition for onset is "Beginning." Used in a sentence: Crocuses bloom at the onset of spring, sometimes even before the snow melts. The definition for raucous is "noisy, rowdy.", the definition for civility is "Politeness.", and the definition for melodious is "Having a pleasing melody."

The definition for belated is "Past the normal or proper time." Used in a sentence: Even though I forgot his birthday, I hoe my father accepts my belated card. The definition for iridescent is "having a lustrous or attractivve quality.", the definition for catastrophic is "Relating to extreme misfortune.", and the definition for mediate is "To come between parties in order to reconcile."

The definition for curtail is "To make less." Used in a sentence: Doreen decided to curtail her spending after she bounced a check. The definition for combative is "eager to fight.", the definition for frugal is "Thrifty, cheap.", and the definition for discern is "To recognize as separate as distinct."

The definition for composed is "Calm." Used in a sentence: Although her stomach was in knots, the actress appeared perfectly composed when she took the stage. The definition for catastrophic is "relating to extreme misfortune.", the definition for surplus is "Excess.", and the definition for gravity is "Importance, significance."