Antonym: changeable, inconstant, mutable. Similar words: instant, instantly, consultant, instance, distant, for instance, assistant, substantial. Meaning: ['kɑnstənt /'kɒn-] 
n. 1. a quantity that does not vary 2. a number representing a quantity assumed to have a fixed value in a specified mathematical context. adj. 1. persistent in occurrence and unvarying in nature 2. continually recurring or continuing without interruption 3. steadfast in purpose or devotion or affection 4. uninterrupted in time and indefinitely long continuing.
n. 1. a quantity that does not vary 2. a number representing a quantity assumed to have a fixed value in a specified mathematical context. adj. 1. persistent in occurrence and unvarying in nature 2. continually recurring or continuing without interruption 3. steadfast in purpose or devotion or affection 4. uninterrupted in time and indefinitely long continuing. 
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151. Constant rejections made him feel worthless.
152. Her parents' constant criticism began to drag her down.
153. His constant criticism made her life a misery.
154. Pool attendants kept a constant watch on the swimmers.
155. I'm under constant pressure at work.
156. Constant dieting can be self-defeating.
157. Pedestrians on this road face constant danger from cars.
158. The brain requires a constant supply of oxygen.
159. The newspapers took constant potshots at the president.
160. I can't stomach your constant nagging.
161. He lives in constant fear of assassination.
162. Constant arguing doesn't make for a happy marriage.
163. Their grandchildren are a constant source of happiness.
164. Soames was getting impatient with his daughter's constant nitpicking.
165. Constant noise can be very wearing on the nerves.
166. She stressed the need for constant vigilance.
167. The constant whine of the machinery jangled his nerves.
168. constant streams of traffic flowed past.
169. Money was a constant source of disagreement.
170. A nurse was in constant attendance.
171. The ruined church acts as a constant reminder of the war.
172. Alan found the constant noise of the traffic an annoyance.
173. She has a low threshold of boredom and needs the constant stimulation of physical activity.
174. The constant repetition of violence has blunted the human response to it.
175. Her constant lying led me to distrust everything she said.
176. They will have to bear the misery of living in constant fear of war.
177. She is in constant demand to make public appearances and give interviews.
178. Rosa's constant refrain is that she doesn't have a life.
179. He claims that the constant aircraft noise has a bad psychological effect on the residents.
180. His wife was a source of constant support during the lean years .
More similar words: instant, instantly, consultant, instance, distant, for instance, assistant, substantial, construct, substantially, constraint, constitute, construction, constitution, constructing, constitutional, non-stop, monster, stand, install, stand by, stand for, stance, stand up, stand out, important, reluctant, standard, CONS, demonstrate.