Complacent (adjective)
مطمئن
showing smug or uncritical satisfaction with oneself or one’s achievements.
Example: “you can’t afford to be complacent about security”
Preventative (adjective)
مانع، مزاحم، روک تھام کرنے والا
designed to keep something undesirable such as illness or harm from occurring; preventive.
Example: “a number of preventative measures are required”