brainless

English

From Middle English braynles; equivalent to brain +‎ -less.

brainless (comparative more brainless, superlative most brainless)

(not comparable) Having no brain.
- 1912, Sir Arthur Conan Doyle, The Lost World‎:
  Surely it was more likely that a brainless creature, acting solely by vague predatory instinct, would give up the chase when I disappeared, and, after a pause of astonishment, would wander away in search of some other prey?
Synonym: anencephalous
(comparable) Unintelligent, with little common sense.
- 1907 August, Robert W[illiam] Chambers, chapter VI, in The Younger Set, New York, N.Y.: D. Appleton & Company, OCLC 24962326:
  "I don't mean all of your friends—only a small proportion—which, however, connects your circle with that deadly, idle, brainless bunch—the insolent chatterers at the opera, the gorged dowagers, the worn-out, passionless men, the enervated matrons of the summer capital, […]!"

having no brain

unintelligent; having little or no common sense

Belarusian: бязмо́зглы (bjazmózhly), бязмо́згі (bjazmózhi)
Bengali: মস্তিষ্কহীন (bn) (môstiṣkôhīn)
Bulgarian: безмо́зъчен (bg) (bezmózǎčen)
Chinese:
Cantonese: 冇腦, 冇脑 (mou⁵ nou⁵)
Mandarin: 瞎頭子／瞎头子 (zh) (xiātóuzi), 無頭腦的／无头脑的 (zh) (wútóunǎo de)
Finnish: aivoton (fi)
French: sans cervelle
German: gedankenlos (de), einfältig (de), hirnlos (de)
Greek: ανεγκέφαλος (el) m (anegkéfalos), άμυαλος (el) m (ámyalos), ανόητος (el) m (anóitos)
Japanese: 頭が悪い (ja) (あたまがわるい, atama ga warui)
Kazakh: мисыз (misyz), ми жоқ (mi joq)
Lithuanian: besmegenis
Maori: rorokore
Persian: بی‌مغز‎ (bi-mağz)
Polish: bezmózgi (pl)
Portuguese: descerebrado
Russian: безмо́зглый (ru) (bezmózglyj)
Spanish: descerebrado (es)
Turkish: akılsız (tr), geri zekalı, gerzek (tr) (slang)
Ukrainian: безмо́зкий (uk) (bezmózkyj)