Synonym: conserve, follow, keep abreast, maintain, preserve, prolong, sustain. Similar words: keep up with, step up, keep, keep on, keep off, keep to, keep away, keep down. Meaning: v. 1. maintain a required pace or level 2. lengthen or extend in duration or space 3. keep in safety and protect from harm, decay, loss, or destruction 4. keep informed 5. prevent from going to bed at night.
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151. She covers so much in these lectures -- I don't know how you manage to keep up.
152. An occasional compliment is necessary to keep up one's self- respect. Mark Twain 
153. Living organisms have a similar tradeoff in deciding how much mutation and innovation is needed to keep up with a changing environment.
154. They're hardly moving at all - I can nearly keep up with them just by walking quick.
155. And Des works out in his home gym to keep up with her youthful vigour.
156. Man on the move Everything a man need to keep up appearances while he's away from home.
157. Maggie had a stone in her shoe and was finding it hard to keep up.
158. Though we no longer went out together in the evenings,(www.Sentencedict.com) I promised to keep up the pretence that we did.
159. Every day, until we could not keep up with the demand, we would make a few extra loaves to sell.
160. She and Laura continued to keep up their friendship through frequent telephone calls and meeting for lunch at least once a month.
161. The established Church failed to keep up either with the growth of the population or with the changing geography of its distribution.
162. B and L were unable to keep up with their loan repayments and the bank appointed administrative receivers.
163. It was easier to keep up a black dress than a white one.
164. I always find it hard to keep up with the latest fashions.
165. Science vainly struggles to keep up, offering hypotheses implicating all manner of causes and suggesting all manner of effects.
166. Hearing voices that keep up a running commentary in the head.
167. Struggling to his feet, he realised he was waving his sword. Things were happening too fast to keep up with.
168. Oranges will produce more flowers and an increase in fruit yield, but only if irrigation can keep up with demand.
169. Otley's cavalry twill and brogues were doing their best to keep up and he was breaking out in a sweat.
170. Axe hacks' snacks One hard-pressed organisation seems determined to keep up its standards despite its financial problems in these hard times.
171. So keep up the heat in your compost heap by covering it with black plastic sheets, old carpets or sacking.
172. I am finding it difficult to keep up this diary knowing you are away.
173. But she could not keep up the duplicity.
174. She is struggling to keep up with her schoolwork.
175. We must keep up with the times [ world affairs ].
176. The comfortable estate of widowhood is the only hope that keep up a wife's spirits.
177. You can't really keep up with world affairs by watching television.
178. As the saying goes, " Vernal Equinox up wheat, fertilizer to keep up. "
179. Wham 0's bookkeeper could not keep up with the production figures.
180. Many students are under pressure to keep up with their schoolwork.
More similar words: keep up with, step up, keep, keep on, keep off, keep to, keep away, keep down, keep out of, keep from, keep back, keep in mind, keep an eye on, keep in touch, keep pace with, keep company with, wrap up, deputy, republic, Republican, sleep, steep, sweep, go to sleep, take effect.