New Words - April 17

Here are few words that I found for last few days:

Here is few new words that I found today:
1. vat - large container
2. drudge - a feeling of ill will or resentment. 
To hold a drudge against a former opponent.
3. lowball - to deliberately estimate a low price
4. tardy - late behind time
5. dichotomous - divided or dividing into 2 parts.
6. efficacy - capacity for providing a desired result or effect.
7. placebo - a substance that have no pharmaceutical effect