unbearable

From Middle English unberable, equivalent to un- +‎ bearable.

unbearable (comparative more unbearable, superlative most unbearable)

So unpleasant or painful as to be unendurable.
- 1945 January and February, A Former Pupil, “Some Memories of Crewe Works—III”, in Railway Magazine, page 14:
  The heat of the fire, the steam which arose from the dampening water, the hard slogging at the white-hot metal of the links, and the continual pulling of lengths of chain, were calculated to put a test on the strongest of men, and often on hot summer days they had to be sent home, for the work became unbearable.

so unpleasant or painful as to be unendurable

Arabic:
Hijazi Arabic: ما يِنْطاق m (ma yinṭāg), غَثِيث m (ḡaṯīṯ)
Armenian: անտանելի (hy) (antaneli)
Azerbaijani: dözülməz
Bulgarian: нетърпим (bg) (netǎrpim), непоносим (bg) (neponosim)
Catalan: insuportable
Czech: nesnesitelný (cs) m
Danish: uudholdelig
Dutch: onuitstaanbaar (nl)
Esperanto: neeltenebla
Finnish: kestämätön, sietämätön (fi)
French: invivable (fr), insupportable (fr)
Georgian: აუტანელი (auṭaneli)
German: unerträglich (de)
Greek: ανυπόφορος (el) (anypóforos), αβίωτος (el) (avíotos)
Ancient: ἀφόρητος (aphórētos), ἄτλατος (átlatos)
Hungarian: elviselhetetlen (hu), kibírhatatlan (hu)
Icelandic: óþolandi
Norwegian:
Bokmål: uutholdelig (no), ulevelig, ikke til å holde ut
Old English: unāberendlīċ
Persian: غِیرِ قابِل تَحَمُّل
Polish: nieznośny (pl)
Portuguese: insuportável (pt)
Romanian: nesuportabil, insuportabil (ro)
Russian: невыноси́мый (ru) (nevynosímyj), нестерпи́мый (ru) (nesterpímyj)
Spanish: insoportable (es), infumable (es) (colloquial), inaguantable (es)
Swedish: outhärdlig (sv)
Telugu: భరించలేని (bhariñcalēni)
Tocharian B: ekalätte
Tày: bấu fă̱n
Ukrainian: нестерпний (nesterpnyj)