Challenge
A call to engage in a contest, fight, or competition: a challenge to a duel.
Effort
The use of physical or mental energy to do something; exertion.
force
The distinctness or clarity of an image rendered by an optical system.
mindset
The distinctness or clarity of an image rendered by an optical system.
gravity
The natural attraction between physical bodies, especially when one of the bodies is a celestial body, such as the earth.
chorus
A group of singers who perform together, usually singing multi-part compositions with more than one singer for each part.
Radiant
Emitting heat or light: a radiant star.
random
Having no specific pattern, purpose, or objective: random movements.`
drone
A male bee, especially a honeybee, that is characteristically stingless, performs no work, and produces no honey. Its only function is to mate with the queen bee.
grim
Discouraging or depressing: The business news has been grim lately.
Bellow
To make the deep roaring sound characteristic of a bull.
canine
Of, relating to, or characteristic of the canids.
casual
Being without ceremony or formality; relaxed or informal: a casual evening with friends.
compromise
A settlement of differences in which each side makes concessions.
downright
Thoroughgoing; unequivocal: a downright lie.
endure
To carry on through, despite hardships; undergo or suffer: endure an Arctic winter.
Emblem
A distinctive badge, design, or device: trucks marked with the company emblem; the emblem of the air force.
ensue
To take place afterward or as a result. See Synonyms at follow.
permanent
Lasting or remaining without essential change: “the universal human yearning for something permanent, enduring, without shadow of change” (Willa Cather).
ponder
To think about (something) with thoroughness and care.
perjury
The crime of willfully and knowingly making a false statement about a material fact while under oath.
pique
To cause to feel resentment or indignation.
persist
To be obstinately repetitious, insistent, or tenacious.
perturb
To disturb or confuse; make uneasy or anxious: I was perturbed by his off-color remarks.