letdown

n.

1. A decrease, decline, or relaxation, as of effort or energy.
2. A disappointment: The cancellation of the game was a real letdown.
3. The descent made by an aircraft in order to land.
4. A physiological response in lactating females, activated usually in response to sucking or crying by an infant, in which milk previously secreted into the alveoli of the breasts is released into the ducts that lead to the nipple.

noun

Unhappiness caused by the failure of one's hopes, desires, or expectations: disappointment, discontent, discontentment, disgruntlement, dissatisfaction, regret. See happy/unhappy.

n

Definition: disappointment
Antonyms: advantage, benefit, blessing, boon, satisfaction, triumph

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1. the sudden flush of milk flow that occurs when the calf begins to suck or when milking commences in a properly prepared cow. Depends for its occurrence on the release of oxytocin from the pituitary gland in response to massage of the teats and udder. Environmental stimuli such as free electricity and fear or excitement can block the response. Is also sometimes absent in freshly calved cows but the cycle can be triggered by an injection of oxytocin.
2. a horse in overfat condition is said to be letdown; the converse of tuckedup.

• milk l. failure — occurs sporadically in all species. May be due to painful conditions of the teat or sharp teeth of sucker. Anxiety, as in maiden heifers, can be a cause. Other cases occur without obvious reason and respond dramatically to a single injection of oxytocin.

Dansk (Danish)
n. - skuffelse, afbrænder, ulempe, afspænding, nedsættelse af tempo

Nederlands (Dutch)
teleurstelling, afknapper, vermindering van inzet, afdalen van vliegtuig

Français (French)
n. - déception, douche froide

Deutsch (German)
n. - Enttäuschung

Ελληνική (Greek)
n. - απογοήτευση, ρίξιμο

Italiano (Italian)
doccia fredda

Português (Portuguese)
n. - abatimento, desapontamento, decepção

Русский (Russian)
замедление, ухудшение, недостаток, разочарование, обман

Español (Spanish)
n. - chasco, desilusión

Svenska (Swedish)
n. - besvikelse, missräkning, bakslag, olägenhet, nackdel, minskning, nedgång, avmattning, avslappning

中文（简体）(Chinese (Simplified))
减低, 松弛, 减退, 失望

中文（繁體）(Chinese (Traditional))
n. - 減低, 鬆弛, 減退, 失望

한국어 (Korean)
n. - 후퇴, 이완, 실망, 부진

日本語 (Japanese)
n. - 落胆, 失望

العربيه (Arabic)
‏(الاسم) خيبه الأمل, التقليل من الكم والحجم‏

עברית (Hebrew)
n. - ‮אכזבה‬

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