less

(short e sound) less, unless, nevertheless, nonetheless, lessen

suffix -less (without):
(short i sound) hapless, tactless, classless, anchorless, tankless, talentless, passionless, bagless, favorless, paperless, ageless, faceless, nameless, blameless, flameless, baseless, tasteless, stateless, shapeless, shameless, aimless, painless, brainless, stainless, weightless, careless, harmless, regardless, waterless, warrantless, dauntless, faultless, flawless, lawless, effortless, endless, edgeless, ventless, senseless, scentless, penniless, meritless, helpless, selfless, reckless, restless, relentless, defenseless, expressionless, breathless, ceaseless, seamless, meaningless, dreamless, featureless, heedless, needless, speechless, sleeveless, sleepless, fearless, tearless, peerless, cheerless, keyless, windowless, victimless, guiltless, suspicionless, limitless, priceless, timeless, tireless, wireless, driverless, spineless, guileless, mindless, sponsorless, contactless, spotless, colorless, jobless, hopeless, homeless, toneless, motionless, odorless, pointless, voiceless, lossless, cordless, formless, remorseless, wordless, worthless, doubtless, powerless, cloudless, countless, soundless, groundless, boundless, boundaryless, bloodless, luckless, dustless, sunless, moonless, ruthless, clueless, fruitless, useless, humorless, sugarless, heartless, thoughtless, merciless, mirthless