Synonym: curse, promise, vouch, vow. Similar words: sweater, wear, wear off, wear out, year after year, sweep, swell, weave. Meaning: [swer /sweə] 
v. 1. utter obscenities or profanities 2. to declare or affirm solemnly and formally as true 3. promise solemnly; take an oath 4. make a deposition; declare under oath 5. have confidence or faith in.
v. 1. utter obscenities or profanities 2. to declare or affirm solemnly and formally as true 3. promise solemnly; take an oath 4. make a deposition; declare under oath 5. have confidence or faith in. 
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61. Barons had to swear an oath of allegiance to the king.
62. He made her swear on the Bible that she wouldn't leave him.
63. I swear I won't forgive her to my dying day!
64. I swear by almighty God that I will tell the truth.
65. The rebels now have to swear allegiance to the queen they hate.
66. I swear quite a lot but even I draw the line at saying certain words.
67. We have a witness who would swear to it in a court of law.
68. Any time you told one of them something, they'd swear you'd mixed them up and told the other.
69. I don't know anything about what happened, I swear .
70. When the taxi driver started to swear at him, he walked off.
71. Many of my friends are using word processors but I still swear by my old typewriter. Sentencedict.com
72. Do you swear on your honour that you will never tell anyone?
73. Are you willing to swear in court that you saw him do it?
74. Bill, remember yourself! Don't swear in front of the children.
75. I'll get my own back on him one day, I swear!
76. All swear words, even mild ones such as 'damn',[sentencedict.com] were deleted from the text.
77. Say that again, but this time leave out the swear - words.
78. He didn't shout or swear, but just glared silently at me.
79. I swear on all I hold dear that I had nothing to do with this.
80. I think it was about ten o'clock when we left, but I couldn't swear to it .
81. He says he was there all the time, but I swear I never saw him.
82. The police are the only civil servants who have to swear allegiance to the Crown.
83. That does it, I'm off. I'm not having you swear like that at me.
84. He mouthed a swear word at me through the window.
85. Many people swear by vitamin C's ability to ward off colds.
86. He has been brought up not to swear in front of women.
87. I swear on my honour that I knew nothing about this.
88. In some countries, witnesses in court have to swear on the Bible.
89. I swear this by the cross.
90. Do you swear to tell the truth?