Frequency: The word is one of the 3000 most common words in English.
Someone who is ~ is hopeful about the future or the success of something in particular.
The President says she is ~ that an agreement can be worked out soon...
Michael was in a jovial and ~ mood.
? pessimistic
ADJ: oft ADJ about n, ADJ that
~ally
Both sides have spoken ~ally about the talks.
ADV: ADV with v