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 proximity is "closeness.", the definition for appalling is "Inspiring dismay or disgust.", and the definition for preclude is "To rule out in advance."

The definition for incumbent is "Necessary as a duty or responsibility." Used in a sentence: It was incumbent on Jack to attend his father's retirement party. The definition for serenity is "calmness.", the definition for ethical is "Conforming to accepted standards.", and the definition for indecorous is "In bad taste."

The definition for ramble is "To wander, physically or in language." Used in a sentence: Professor Tan rambled during his lectures, frequently straying from the subject. The definition for implausible is "unbelievable.", the definition for regurgitate is "To pour out or throw back.", and the definition for ramble is "To wander, physically or in language."

The definition for unscrupulous is "Lacking principles." Used in a sentence: The unscrupulous salesman was fired for lying to his customers. The definition for drub is "to defeat decisively.", the definition for rehash is "To discuss again.", and the definition for drab is "Dull, monotonous."

The definition for buffer is "Protective barrier." Used in a sentence: The dense trees acted as a buffer against the heavy rain. The definition for straddle is "to favor opposing sides.", the definition for augment is "To make greater.", and the definition for raucous is "Noisy, rowdy."