Safe, or secure.
Unsafe work practices can lead to injury. After the earthquake, the building was declared unsafe and was torn down.
Practical is the opposite of impractical
Unlikely, but possible- and it IS unsafe.
Ergonomics
The opposite of dynamic is static.
the opposite of unsafe situation is safety , comfortable , relaxed.
un secure, un locked, unsafe
unsafe the lack or absence of safety
For the verb "secure"- the opposite of secure (to fasten) is to release or detach- the opposite of secure (to obtain) is to lose or forfeitFor the adjective "secure" (safe, protected), the opposite in insecure, non-secure, unsafe, unprotected, or threatened.
At risk; exposed; unsafe; unprotected; unguarded; vulnerable; insecure; harmful; dangerous.
Unsafe
During your menstrual cycle there is a period known as safe which is when you don't ovulate. The opposite is the period when you do ovulate which is unsafe if you want to avoid pregnancy. Some couples rely ion this as a contraceptive but it's very unsafe since women don't always ovulate at the same days each month.
DO NOT DO THIS!!! UNSAFE!!!!!!!!!! UNSAFE!!!!!!!!!!!! UNSAFE!!!!!!!!!!!!!!
NO, NO, NO, NO, NO!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! DANGER, DANGER, DANGER, DANGER!!!!!!!!!!!!!!!!!!!!!!! UNSAFE, UNSAFE, UNSAFE, UNSAFE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Unsafe product
DO NOT ATTEMPT TO DO THIS!!!!!!!!!!!!!!!!!!!!!!!!!!!! DANGER, DANGER, DANGER!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! UNSAFE, UNSAFE, UNSAFE, UNSAFE
Doing dangerous things will make you unsafe. Inspectors found unsafe conditions in the company's factory.