Power Suffix: -less – 15 Words

boundless

seemingly limitless in amount, number, degree, or extent

The picture looked like a miniature monochrome galaxy, teeming with stars and worlds and boundless potential.We Are the Ants
careless

marked by lack of attention or consideration or forethought

My mother would call me careless for letting this happen.Made You Up
dauntless

invulnerable to fear or intimidation

The sea journey from Newcastle to Oslo took two days and a night, and if it was rough, as it often was, all of us got seasick except our dauntless mother.Boy: Tales of a Childhood
defenseless

lacking protection or support

But the family also knew another side of Luma—that of a sensitive young woman with a deep concern for the weak or defenseless.Outcasts United: An American Town, a Refugee Team, and One Woman’s Quest to Make a Difference
effortless

not showing exertion or strain

It’s such a graceful and effortless movement that I’m momentarily filled with envy.Everything, Everything
fruitless

unproductive of success

After a minute of fruitless searching, she was simultaneously relieved and disappointed.The Martian
peerless

eminent beyond or above comparison

The peerless laboratory facilities and distinguished faculty of New Haven, Connecticut, attracted an especially promising crop of young researchers.Big Science
relentless

never-ceasing

The relentless pounding continued—not the rapping of knuckles, but the full-fisted heel of a hand.Scythe
remorseless

without mercy or pity

Most like a spider she was, but huger than the great hunting beasts, and more terrible than they because of the evil purpose in her remorseless eyes.The Two Towers
seamless

perfectly consistent and coherent

But even as the walls fell, there were still a lot of barriers to seamless global integration.The World Is Flat
senseless

not marked by the use of reason

It seemed senseless to run away without money.From the Mixed-Up Files of Mrs. Basil E. Frankweiler
shiftless

lacking ambition or initiative

The skinflint materializes now and then to advise Dickens on storytelling and life choices, especially those involving the scribe’s shiftless though charming father.Washington Post (Nov 17, 2017)
speechless

temporarily incapable of speaking

When they woke up, with the sun already high in the sky, they were speechless with fascination.One Hundred Years of Solitude
timeless

unaffected by the continuum from the past to the future

He was bold and inspiring as he fought for the rights of people of every persuasion to speak their minds, and he remains inspiring in his commitment to this timeless American value today.Washington Times (Aug 12, 2018)
worthless

lacking in usefulness or value

But now, in the bright sunlight of midday, the place looks like just another worthless patch of prairie.Dread Nation

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