conserved — Simple past tense and past participle of conserve.
abstained — to hold oneself back voluntarily, especially from something regarded as improper or unhealthy (usually followed by from): to abstain from eating meat.
opened — not closed or barred at the time, as a doorway by a door, a window by a sash, or a gateway by a gate: to leave the windows open at night.
sipped — to drink (a liquid) a little at a time; take small tastes of: He sipped the hot tea noisily.
