1.
If you describe someone as ~, you mean that they help you in some way, such as doing part of your job for you or by giving you advice or information.
The staff in the London office are ~ but only have limited information...
ADJ
~ly
They had ~ly provided us with instructions on how to find the house...
ADV: ADV with v
~ness
The level of expertise and ~ness is far higher in smaller shops.
N-UNCOUNT
2.
If you describe information or advice as ~, you mean that it is useful for you.
The following information may be ~ to readers.
? un~
ADJ
3.
Something that is ~ makes a situation more pleasant or more easy to tolerate.
It is often ~ to have your spouse in the room when major news is expected...
ADJ: oft it v-link ADJ to-inf, ADJ for n/-ing, ADJ in -ing/n