Synonyms: cautious, careful, prudent, vigilant, wary, secretive, cagey
Antonyms: reckless, thoughtless
cautious: not willing to take risks
Example: She’s a very cautious driver.
careful: taking care not to make mistakes or cause harm
Example: Be careful not to make any noise – the baby is asleep. She is very careful
about what she eats.
prudent: showing good sense and using good judgement
Example: It would be prudent to consult a lawyer before you sign the contract.
vigilant: staying very aware of possible danger
Example: The disease particularly affects young children, so parents must remain
wary: aware of a possible problem with someone or something
Example: I am very wary of any of his ideas for making money.
secretive: liking to keep things secret
Example: She’s very secretive about her private life.
cagey: (informal) not wanting to share information
Example: They’re being very cagey about their relationship.
reckless: doing something or done without thinking
thoughtless: without thinking about other people