Word: foil
Definitions, according to the Online Cambridge Dictionary:
As a noun: 1. a very thin sheet of metal, especially used to wrap food in to keep it fresh 2. a thin, light sword used in the sport of fencing. 3. something or someone that makes another's good or bad qualities more noticeable. 4. Abbreviation for first, outer, inner, last, the rule for multiplying two binomials (= statements that have two numbers or symbols each).
Sentences:
- My mom wrapped my lunch in aluminum foil.
- Kevin has a set of foils in his room that he hasn't used since 2006.
- The timid Elena was a foil to Rachel's comedy abilities.
- Although it is not necessary to multiply binomials by following the FOIL order, it does make the process easier.
As a verb: 1. to prevent someone or something from being successful.
- Her bad manners have foiled her from getting a decent boyfriend.