4th Grade Vocabulary Words - List 19

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Word Definition Practice Sentence Synonyms Antonyms Part of Speech Description
acidic Astringent or containing acid, or having a pH below 7. The acidic taste of the vinegar hurt my tongue. containing acid, sour, astringent sweet Adjective
sulk Be gloomy or silent because of disappointment or annoyance. My cat went to the bedroom to sulk because I yelled at him. pout, frown, mope grin, smile Verb
diligent Hard-working and perseverant with one's duties. He was diligent with his chores in the morning, but after lunch he got lazy. active, attentive, eager careless, idle, neglectful Adjective
conclusion The end of an event or a decision reached through reasoning. The conclusion of the story was an unexpected twist. end, outcome, completion origin, beginning, start Noun
stammer Involuntary pauses in speech. She turned beet red and started to stammer during her speech. stutter, sputter, stumble enunciate, pronounce Verb
synthesize Make something or combine a number of things. Artificial intelligence can synthesize the actor's voice. manufacture, orchestrate, combine divide, disperse Verb
rotation The action of rotating around a center or axis. The planet Earth makes one rotation on its axis every 23 hours and 56 minutes. orbit, circle, revolution Noun
intercept Obstruct someone or something to prevent progress. The spies were able to intercept the message, block, catch, ambush release, aid, permit Verb
invitation A written or verbal request. Your invitation must have gotten lost in the mail. request, proposal discouragement, repulsion Noun
tyranny Cruel and oppressive use of power. The leader's tyranny made her followers fearful. dictatorship, domination, oppression democracy Noun

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