Synonym: changeable, doubtful, insecure, precarious, speculative, unpredictable, unsure. Antonym: certain. Similar words: uncertainty, certain, for certain, certainly, certainly not, entertainment, curtain, concert. Meaning: [ʌnˈsɜːt(ə)n; -tɪn] 
adj. 1. lacking or indicating lack of confidence or assurance 2. not established beyond doubt; still undecided or unknown 3. not established or confirmed 4. not certain to occur; not inevitable 5. subject to change 6. not consistent or dependable 7. ambiguous (especially in the negative).
adj. 1. lacking or indicating lack of confidence or assurance 2. not established beyond doubt; still undecided or unknown 3. not established or confirmed 4. not certain to occur; not inevitable 5. subject to change 6. not consistent or dependable 7. ambiguous (especially in the negative). 
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61. We were rather uncertain of the direction it came from.
62. The conclusion stood on some uncertain matters, so it's wrong.
63. They were uncertain of the total value of the transaction.
64. As the project comes to an end, many workers now face an uncertain future .
65. Her future is uncertain.
66. How far the republics can give practical help, however, is uncertain.
67. I told him what I thought of him in no uncertain terms!
68. Students all over the country are facing an uncertain future.
69. I told Colin in no uncertain terms what I thought of him.
70. I was told in no uncertain terms that Helen, wouldn't you know it, didn't approve.
71. This ugly term foreshadows uncertain consequences.
72. The completion date for the rail link is uncertain.
73. The future is no more uncertain than the present. Walt Whitman 
74. Scientists characterize the humanities as uncertain[sentencedict.com], vague and irrelevant.
75. Yet many people remain uncertain regarding his true beliefs.
76. He, Kramer, occupied some uncertain position in the middle.
77. The respective casualty figures are, as usual, uncertain.
78. The actions left industry analysts uncertain about the deal.
79. In return, the Church cut a somewhat uncertain figure.
80. The etiology of these is uncertain.
81. What it means for the remaining goaltenders is uncertain.
82. He said so in no uncertain terms.
83. However, the generality of this is uncertain.
84. People living on the proposed site say their future is now more uncertain than ever.
85. The boy holding a gun too, but pointing it at the floor, uncertain what to do.
86. When they announced the closure of the North and South Works, things were very uncertain.
86. Sentencedict.com try its best to gather and build good sentences.
87. She hated the girls, feared Miss Poole and was uncertain about her teaching.
88. In part this difficulty may stem from the uncertain legal nature of the action for breach of confidence.
89. Exports to the United States faced an uncertain future because of the rise in costs.
90. Everyone at the front of the procession was now feeling deeply uncertain.
More similar words: uncertainty, certain, for certain, certainly, certainly not, entertainment, curtain, concert, maintain, undertake, uncomfortable, cancer, obtain, retain, dancer, sustain, contain, captain, concern, bounce, container, retaining, announce, sustainable, concerning, of importance, announcement, maintenance, officer, soccer.