testing

Difficult enough to require a lot of effort, patience, or skill.

• It was a testing day.
• We faced testing conditions on the mountain.
• These have been testing times for the family.

Similar words: difficult, challenging, demanding

Opposites: easy

Common phrases: testing time, testing conditions, testing period

The activity of checking how well something works or whether something is true, safe, or suitable.

• The testing took two days.
• Safety testing revealed a problem with the toy.
• We need more testing before selling the software.

How to use it: testing of something (Testing of the new equipment starts tomorrow.)

Similar words: evaluation, checking

Common phrases: safety testing, product testing, testing of something