Nervous and worried. / Having a feeling of anxiety or disquietude; extremely concerned, especially about something that will happen in the future or that is unknown.

In an anxious manner; with painful uncertainty; solicitously.

The state of being anxious. / A feeling of anxiety.

(nonstandard) comparative form of anxious: more anxious

plural of anxiousness

(nonstandard) superlative form of anxious: most anxious