- Afrikaans: swak (af)
- Albanian: i lig (sq),e ligë (sq), i dobët (sq)
- Amharic: ደካማ (däkama), ለዋሳ (läwasa)
- Arabic: ضَعِيف (ḍaʕīf)
- Egyptian Arabic: ضعيف (ḍaʕīf)
- Moroccan Arabic: عيّان (ʕəyyæn)
- Armenian: թույլ (hy) (tʻuyl), տկար (hy) (tkar)
- Aromanian: slab
- Asturian: débil
- Azerbaijani: zəif (az), gücsüz
- Bashkir: көсһөҙ (köshöź)
- Basque: ahul
- Belarusian: сла́бы (be) (sláby)
- Bengali: দুর্বল (bn) (durbol)
- Bhojpuri: कमजोर (kamᵊjōr)
- Bikol Central: maluya (bcl)
- Breton: gwan (br)
- Bulgarian: слаб (bg) (slab)
- Burmese: အားနည်း (my) (a:nany:)
- Catalan: feble (ca), dèbil (ca)
- Chechen: гӏийла (ğiı̇la), мела (mela)
- Chinese:
- Cantonese: 弱 (joek6), 虛弱 / 虚弱 (heoi1 joek6)
- Mandarin: 弱 (zh) (ruò), 微弱 (zh) (wēiruò), 軟弱 / 软弱 (zh) (ruǎnruò)
- Corsican: debuli (co)
- Crimean Tatar: quvetsiz, zayıf
- Czech: slabý (cs)
- Dalmatian: débol
- Danish: svag, veg
- Dutch: zwak (nl), slap (nl)
- Erzya: лавшо (lavšo)
- Esperanto: malforta
- Estonian: nõrk
- Faroese: veikur (fo)
- Finnish: heikko (fi)
- French: faible (fr), débile (fr)
- Friulian: debul
- Galician: débil (gl), feble, fraco (gl), frouxo (gl)
- Georgian: სუსტი (susṭi), უძლური (uʒluri), უღონო (uɣono)
- German: schwach (de)
- Gothic: 𐌿𐌽𐌼𐌰𐌷𐍄𐌴𐌹𐌲𐍃 (unmahteigs)
- Greek: αδύναμος (el) (adýnamos)
- Ancient: ἀσθενής (asthenḗs), μῶλυς (môlus)
- Guaraní: kangy
- Hebrew: חַלָּשׁ (he) (khalásh)
- Higaonon: mahuyang
- Hindi: दुर्बल (hi) (durbal), निर्बल (hi) (nirbal), कमज़ोर (kamzor), अशक्त (hi) (aśakt)
- Hungarian: gyenge (hu), gyönge (hu)
- Icelandic: veikur (is)
- Ido: febla (io), debila (io)
- Indonesian: lemah (id)
- Ingrian: heikko, see Thesaurus:heikko
- Irish: lag, aimhneartach, anbhann, creatach, crólag, cróloite, deibhleánach, éadaingean, éagrua, éalangach, éidréan, fann, féigh, foríseal, lagbhríoch, leamh, lobhrach, maoth, meath-, meathánta, sleaiceáilte, slim, tais, tim, tláith, tréith, triamhain
- Italian: debole (it)
- Japanese: 弱い (ja) (よわい, yowai)
- Kazakh: әлсіз (älsız), күшсіз (küşsız)
- Khmer: ខ្សោយ (km) (khsaoy)
- Korean: 약하다 (ko) (yakhada)
- Kyrgyz: күчсүз (ky) (kücsüz), алсыз (ky) (alsız)
- Lao: ຍໍ່ແຍ່ (nyǭ nyǣ), ບໍ່ແຂງແຮງ (bǭ khǣng hǣng)
- Latgalian: sluobs
- Latin: debilis, imbecillus, languidus, infirmus, invalidus
- Latvian: vārgs, vājš
- Lithuanian: silpnas (lt)
- Macedonian: слаб (slab)
- Malay: lemah (ms)
- Maltese: dgħajjef
- Maori: tahō
- Mbyá Guaraní: kangy
- Mongolian: сул дорой (sul doroj), муу (mn) (muu), дорой (mn) (doroj)
- Norman: faibl'ye
- Norwegian:
- Bokmål: svak (no), veik
- Occitan: feble (oc), debil
- Old Church Slavonic:
- Cyrillic: слабъ (slabŭ)
- Glagolitic: ⱄⰾⰰⰱⱏ (slabŭ)
- Old English: untrum
- Ottoman Turkish: ضعیف (zaʼif), درمانسز (dermansız)
- Pashto: ايڼ (iṇ)
- Persian: ضعیف (fa) (za'if), نزار (fa) (nezâr)
- Plautdietsch: schwak
- Polabian: slobĕ
- Polish: słaby (pl)
- Portuguese: fraco (pt), débil (pt), frouxo (pt)
- Romanian: slab (ro), debil (ro), lânced (ro)
- Romansch: debel, flaivel, fleivel, flevel
- Russian: сла́бый (ru) (slábyj)
- Sanskrit: निर्बल (sa) (nirbala), दुर्बल (sa) (durbala), अशक्त (sa) (aśakta)
- Santali: ᱚᱵᱳᱞ (ôbol)
- Sardinian: débbile, débbili, díbbile
- Scottish Gaelic: lag
- Serbo-Croatian:
- Cyrillic: слаб
- Roman: slab (sh)
- Sicilian: dèbbuli (scn), dèbuli (scn), dèbbili (scn), dèbili (scn)
- Slovak: slabý
- Slovene: šíbek (sl), slàb (sl) (archaic)
- Sorbian:
- Lower Sorbian: słaby
- Spanish: débil (es), feble (es), flaco (es), flojo (es), pilishte (Central America), pilishne (El Salvador), pishteluco (Guatemala)
- Swahili: dhaifu (sw)
- Swedish: svag (sv), vek (sv)
- Tagalog: mahina
- Tajik: заиф (tg) (zayif), низор (nizor)
- Tatar: көчсез (köçsez)
- Thai: อ่อนแอ (th) (ɔ̀ɔn-ɛɛ), แอ (th) (ɛɛ), อ่อน (th) (ɔ̀ɔn)
- Tibetan: སྐྱོ་པོ (skyo po)
- Tok Pisin: hanggre
- Turkish: zayıf (tr), güçsüz (tr)
- Turkmen: asgyn (tk), gowşak, gujursyz, ejiz
- Ukrainian: слабки́й (slabkýj), сла́бий (slábyj)
- Urdu: دربل (durbal), کمزور (kamzor), اشکت (aśakt)
- Uyghur: ئاجىز (ajiz), كۈچسىز (küchsiz)
- Uzbek: kuchsiz (uz), zaif (uz)
- Venetan: debol, debole, debolo, debełe
- Vietnamese: yếu (vi)
- Walloon: flåwe (wa), fwebe (wa)
- Welsh: gwan (cy)
- Yiddish: שוואַך (shvakh)
- Zhuang: nyieg
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