continuing forever or for an indefinitely long time
example
The perpetual motion machine seemed to defy the laws of physics, operating endlessly without any external energy source.
synonyms
everlastingeternalunending
word origin — from Middle English 'perpetuel', from Old French 'perpetuel', from Latin 'perpetualis', from 'perpetuus'.
SAT Vocabulary Level 2 — Set 305
Set 305 of SAT Vocabulary Level 2 covers 5 words: perpetual, tranquil, unnatural, immaculate, exuberant. Each entry below includes its definition, an example sentence, and synonyms — practice them with the interactive cards above.
perpetual · adjective/pərˈpɛtʃuəl/
continuing forever or for an indefinitely long time
The perpetual motion machine seemed to defy the laws of physics, operating endlessly without any external energy source.
Synonyms: everlasting, eternal, unending
Origin: from Middle English 'perpetuel', from Old French 'perpetuel', from Latin 'perpetualis', from 'perpetuus'.
tranquil · adjective/ˈtræŋ.kwəl/
free from disturbance or turmoil calm and peaceful
The tranquil waters of the lake reflected the vibrant colors of the sunset, creating a serene atmosphere.
Synonyms: calm, serene, placid
Origin: The word 'tranquil' originates from the Latin 'tranquillus', meaning 'calm, still, quiet'.
unnatural · adjective/ʌnˈnætʃ.ɚ.əl/
not occurring naturally; artificial or contrived
The bright pink color of the decorations seemed completely unnatural in the rustic setting of the farmhouse.
Synonyms: artificial, contrived, fake
Origin: The word 'unnatural' originates from the Latin 'unnaturalis', where 'un-' means 'not' and 'naturalis' means 'natural'.
immaculate · adjective/ɪˈmækjələt/
free from flaws or mistakes; perfectly clean or tidy
The bride's dress was absolutely immaculate, with every stitch perfectly in place.
Synonyms: spotless, pristine, flawless
Origin: from Latin 'immaculatus,' meaning 'unstained, spotless,' from 'in-' (not) + 'maculam' (spot or stain)
exuberant · adjective/ɪɡˈzuːbərənt/
filled with lively energy and excitement
The children's exuberant laughter filled the playground, creating an atmosphere of joy and excitement.
Synonyms: enthusiastic, lively, vivacious
Origin: Derived from the Latin 'exuberantem', the present participle of 'exuberare', meaning 'to be abundant' or 'to be fruitful'.