Conditions may not be ideal

condo

to conduct a conversation

I conduct the business.

conductor

to confess oneself guilty

He confessed himself his vassal

in confidence

confident to a fault

confidential chat

confidential talk

to be confined to bed

He is confined to bed

to confirm availability of …

to be in conflict with someone

in conformity with the contract

confound you

Confound it

Confound his impudence!

to confuse

It confuses me.

to congee

I congratulate you!

I congratulated him on his success

Congratulations, you wrote a good essay.