| blacken | (verb) make or become black | Synonyms: black, melanise, melanize |
|---|
| (verb) burn slightly and superficially so as to affect color | Synonyms: char, scorch, sear |
| quicken | (verb) give new life or energy to | Synonyms: animate, reanimate, recreate, renovate, repair, revive, revivify, vivify |
|---|
| (verb) show signs of life | - |
| (verb) give life or energy to | Synonyms: invigorate |
| (verb) move faster | Synonyms: accelerate, speed, speed up |
| (verb) make keen or more acute | Synonyms: whet |
| sicken | (verb) get sick | Synonyms: come down |
|---|
| (verb) make sick or ill | - |
| (verb) cause aversion in; offend the moral sense of | Synonyms: churn up, disgust, nauseate, revolt |
| (verb) upset and make nauseated | Synonyms: nauseate, turn one's stomach |
| slacken | (verb) become looser or slack | - |
|---|
| (verb) make slack as by lessening tension or firmness | Synonyms: remit |
| (verb) become slow or slower | Synonyms: slack, slow, slow down, slow up |
| (verb) make less active or fast | Synonyms: relax, slack, slack up |
| thicken | (verb) become thick or thicker | Synonyms: inspissate |
|---|
| (verb) make thick or thicker | Synonyms: inspissate |
| (verb) make viscous or dense | Synonyms: inspissate |