about
This book is about Timor-Leste.

angry
angry about/at/over

anxious
to be anxious about something

any
...any books about this topic.

anything
I don't know anything about computers.

care
I don't care about my appearance.

complain
...been complaining about the poor road infrastructure.

concern
a concern about

concerned
to be concerned about

delicacy
...to you about a matter of some delicacy.

imagine
I imagine that they all know about this.

mad
He is mad about sports.

nervous
...be nervous about going to the doctor.

secure
to feel secure about the future

zip
I know zip about agriculture.