FOIL= (verb) (v.) 1. to hinder someone’s efforts or thwart a plan; 2. to enhance
something by using contrast;
(n.) 1. something that serves as a useful contrast to something else;
2. thin, flexible metal, often aluminum

Synonyms:
(v.) thwart, prevent, hinder, baffle, prohibit, frustrate, counter, balk, (n.) contrast, antithesis, background

Antonyms:
(v.) help, aid, expedite

Examples:
Lisa will not let negative people foil her plans for happiness.
Arnold became a hero the day he foiled the heist.
Marc’s plan to disrupt our slumber party was foiled when Joanne caught him with his squirt gun.

HARBOR = (n.) 1. a safe, protected area; 2. a port for ships; (v.) 1. to
provide shelter to a person or to a ship; 2. to hold in or think
privately about

Synonyms:
(n.) port, refuge, shelter, sanctuary, haven, anchorage, marina, (v.) shelter, hold, protect

Antonyms:
expose

Examples:
- The ships in the harbor were not affected by the stormy waves further out to sea.
- I hope Paul harbors no anger against me for my long delay in responding to his e-mail.
- I could tell that all of the ladies harbored a little animosity toward the prettiest girl at the party.