Weakly

Adjective

 * 1) Frail, sickly or of a delicate constitution; weak.
 * 2) * 1885, I lay in weakly case and confined to my bed for four months before I was able to rise and health returned to me. — Sir Richard Burton, The Book of the Thousand Nights and a Night, Night 18
 * 3) * 1889, I'd always been but weakly, / And my baby was just born; / A neighbour minded her by day, / I minded her till morn. — WB Yeats, ‘The Ballad of Moll Magee’
 * 4) * 1922,,  Chapter 1
 * "Oh, a huge crab," Jacob murmured—and begins his journey on weakly legs on the sandy bottom.

Adverb

 * 1) With little strength or force

Thesaurus
a bit, a la sourdine, a little, anemic, asthenic, barely, bloodless, by a hair, by an ace, cachectic, chicken, cowardly, daintily, debilitated, decrepit, delicately, dimly, drained, drooping, droopy, dull, effeminately, effete, enervated, etiolated, ever so little, exhausted, exiguously, failing, faint, faintish, faintly, feeble, feebly, flabby, flaccid, flimsy, floppy, fragile, frail, gently, gone, gutless, hardly, healthless, hushedly, imbecile, imperfectly, impotent, in poor health, inappreciably, inconsequentially, infirm, infirmly, insignificantly, insubstantial, invalid, just a bit, languid, languishing, languorous, languorously, lightly, limber, limp, listless, listlessly, little, low, lustless, marrowless, meagerly, minimally, minutely, moribund, negligibly, nerveless, not hardly, only just, pale, peaked, peaky, pianissimo, piano, pithless, pooped, powerless, reduced, reduced in health, rubbery, run-down, sapless, scantily, scarcely, shakily, sickly, sinewless, slack, slightly, soft, softly, sordamente, sordo, spineless, strengthless, strengthlessly, subduedly, tant soit peu, teeteringly, totteringly, triflingly, unhardened, unhealthy, unnerved, unsound, unsoundly, unsteadily, unstrung, unsubstantial, unsubstantially, valetudinarian, valetudinary, weak, weakened, with low resistance

Translations

 * Polish: słabo