Synonym: done for, ruined, sunk, unstuck, washed-up. Similar words: hand on, off and on, abandon, condone, abandoned, depend on, abandonment, undo. Meaning: [‚ʌn'duː] 
adj. 1. not done 2. doomed to extinction 3. not fastened or tied or secured 4. thrown into a state of disorganization or incoherence.
adj. 1. not done 2. doomed to extinction 3. not fastened or tied or secured 4. thrown into a state of disorganization or incoherence. 
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31 I can't get this knot undone.
32 The work was left/remained undone.
33 The buttons on her blouse had come undone.
34 So much had been left undone .
35 Most of the work had been left undone.
36 Our folly has undone us.
37 My shoe laces have come undone.
38 This mistake has undone all our good work.
39 Why didn't you tell me my zip was undone!
40 My zip has come undone.
41 He had undone the buttons of his shirt, exposing an unsightly expanse of white flesh.
42 We left the washing-up undone and went out for the day.
43 Your fly is undone!
44 Then I went to the toilets and, horror of horrors, discovered that my zip had been undone.
44 Sentencedict.com try its best to gather and build good sentences.
45 Your shoelaces are undone.
46 Some clamps that had held the device together came undone.
47 The team was undone by the speed and strength of their opponents.
48 His buttons were undone.
49 Lace your boots firmly or the lace will come undone.
50 Your flies are undone!
51 Your buttons areall undone.
52 Your laces are undone.
53 His collar was undone.
54 Fixing a 40-year-old wrong does not mean, however, that history can be undone.
55 He arrived out of breath with his shirt undone and his tie askew.
56 Your shoelace is undone.
57 His flies were undone and his shirt torn.
58 Nothing is left undone(sentencedict.com), nothing left to chance.
59 The stitching has come undone.
60 Stelling was eventually undone by his political mistakes.
More similar words: hand on, off and on, abandon, condone, abandoned, depend on, abandonment, undo, run down, sound off, undoing, round off, undoubtedly, underground, round and round, done, donor, hold on, outdone, done in, done for, pardon, donate, cordon, head on, feed on, based on, hold on to, don't care, sardonic.