The definition for oblivious is "Lacking awareness." Used in a sentence: Love–struck Charlie was oblivious to everyone but the object of his affection. The definition for redouble is "to make twice as great.", the definition for incumbent is "Necessary as a duty or responsibility.", and the definition for gruff is "Rough or stern in manner or speech."

The definition for fickle is "Lacking constancy, changeable." Used in a sentence: The fickle Senji had a new best friend every month. The definition for pretense is "false intention or purpose.", the definition for lenient is "Mild or tolerant.", and the definition for clarity is "Clearness."

The definition for camaraderie is "Spirit of friendship." Used in a sentence: The manager hoped the retreat would increase the camaraderie among the feuding workers. The definition for induce is "to influence or cause.", the definition for augment is "To make greater.", and the definition for implausible is "Unbelievable."

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 plaudits is "enthusiastic approval.", the definition for regale is "To amuse.", and the definition for beneficial is "Helpful."

The definition for naive is "Lacking worldy wisdom." Used in a sentence: The naive Simon assumed that everyone was as simple and kind as he was. The definition for revoke is "to cancel by taking back.", the definition for regale is "To amuse.", and the definition for turmoil is "Extreme confusion, agitation."