Synonym: disagreeable, distasteful, intolerable, loathsome, objectionable, offensive, repulsive, unacceptable, unpleasant, unsatisfactory, unsuitable. Antonym: desirable. Similar words: desirable, desire, parable, adorable, bearable, incurable, favorable, miserable. Meaning: n. one whose presence is undesirable. adj. 1. not desirable 2. not worthy of being chosen (especially as a spouse).
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1) The drug has no undesirable side-effects.
2) Inflation is considered to be undesirable because of its adverse effects on income distribution.
3) It is clearly undesirable for the issue to be ignored.
4) Certain chemicals can induce undesirable changes in the nervous system.
5) He had been led astray by undesirable friends.
6) They are the undesirable elements among the employees.
7) A large group of undesirable strangers crashed her party.
8) Military intervention is highly undesirable.
9) The drug may have other undesirable effects.
10) Certain estates are labelled as undesirable.
11) These alternatives are economically undesirable.
12) She's a most undesirable influence.
13) The merchant worked off an undesirable lot of goods.
14) It would be highly undesirable to increase class sizes further.
15) Illiterate and undesirable are treated as synonymous.
16) Many tried to make themselves deeply undesirable.
17) All of these potential outcomes are extremely undesirable.
18) It gets the undesirable strays off the streets.
19) But it was a lottery and lotteries were undesirable.
20) Desirable desires are priceless,[http://sentencedict.com/undesirable.html] undesirable desires are costly. Dr T.P.Chia 
21) It is a myth that repetition is totally undesirable.
22) The incident could have undesirable consequences for the government.
23) Rent control laws can have a number of undesirable effects.
24) Houses near industrial sites often do not sell so quickly because they are regarded as undesirable.
25) I tried to avoid the back room where the undesirable elements were gathered.
26) These so - called merits are often offset by its undesirable effects.
27) It was felt that the ageing of society was socially and economically undesirable.
28) The subject matter makes the painting a little, how shall I put it , undesirable for public display.
29) He will mention the relevant laws that fence out undesirable immigrants.
30) Commonly, both are used consistently to help replace an undesirable behaviour with acceptable behaviour.
More similar words: desirable, desire, parable, adorable, bearable, incurable, favorable, miserable, favourable, comparable, venerable, endurable, vulnerable, preferable, inexorable, innumerable, unfavourable, unfavorable, despicable, transferable, considerable, indestructible, desist, design, designs, besides, design for, designer, desiccant, designing.