be careful or certain to do something; make certain of something | set straight or right |
learn or discover with certainty | make right or correct |
find out, learn, or determine with certainty, usually by making an inquiry or other effort | reduce to a fine, unmixed, or pure state; separate from extraneous matter or cleanse from impurities |
establish after a calculation, investigation, experiment, survey, or study | convert into direct current |
| bring, lead, or force to abandon a wrong or evil course of life, conduct, and adopt a right one |
| determine the length of |