not financially safe or secure
"a bad investment"
"high risk investments"
"anything that promises to pay too much can't help being risky"
"speculative business enterprises"
Dangerous, involving risks.
"The mountain climber refused to attempt the uncharted route because it was too risky."
In plain English: Something risky is dangerous because it could cause you to get hurt or lose something important if things go wrong.
"Investing all your savings in that new startup is very risky."
The word risky comes from combining the noun risk with the suffix -y to form an adjective meaning full of or involving danger. This straightforward construction allowed speakers to easily describe situations that carried a chance of loss or harm.