1. parental

parental is used to describe something that relates to parents in general, or to one or both of the parents of a particular child.

e.g. Parental attitudes vary widely.

2. write-off

Something such as a vehicle that is a write-off has been so badly damaged in an accident that it is not worth repairing.

e.g. The car was a write-off, but everyone escaped unharmed.

3. diffuse

If something such as knowledge or information is diffused, or if it diffuses somewhere, it made known over a wide area or to a lot of people.

e.g. Over time, the technology is diffused and adopted by other countries.