The definition for comprehensible is "Understandable." Used in a sentence: Shannon spoke slowly so her directions would be comprehensible to her foreign visitor. The definition for fickle is "lacking constancy, changeable.", the definition for extant is "Currently existing.", and the definition for civility is "Politeness."

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 turmoil is "extreme confusion, agitation.", the definition for flaw is "An imperfection.", and the definition for retroactive is "effective as of a prior time or condition."

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 inflammatory is "tending to excite anger.", the definition for disdain is "Feeling of contempt.", and the definition for insolence is "Boldness or rudeness."

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 clairvoyance is "ability to see things beyond ordinary perception.", the definition for comprehensible is "Understandable.", and the definition for prudent is "Marked by wisdom, shrewd."

The definition for repel is "To resist, reject." Used in a sentence: The soldiers made a massive charge to repel the invaders. The definition for interminable is "never ending, or seemingly endless.", the definition for inauspicious is "Not favorable.", and the definition for brandish is "To shake or wave menacingly."