To appease or pacify; make (someone) less angry or hostile. “The customer service representative tried to placate the dissatisfied customer.”

Not conforming to type; unusual or irregular. Deviating from what is usual or common or to be expected; often somewhat odd or strange. “The strong sales were atypical of the normally weak market.”

Being or seeming to be everywhere, or in all places, at the same time; omnipresent. “Ubiquitous cell phones.”

Happening by accident or chance. Happening by a fortunate accident or chance. Lucky or fortunate. “The check could not have arrived at a more fortuitous time.”

Lacking flavor or zest; not tasty. Lacking qualities that excite, stimulate, or interest; dull. “The insipid play caused many to walk out of the theater.”

Having great volume, fullness, size, or number; ample or lengthy in speech or writing. “Voluminous paperwork.”

A keen feeling of mental unease, as of annoyance or embarrassment, caused by failure, disappointment, or a disconcerting event. “He decided to take the day off, much to the chagrin of his boss.”