1. Feeling worry or concern or insecurity.
2. Filled with regret or concern; used often to soften an unpleasant statement.
3. Having feelings of aversion or unwillingness.
4. Filled with fear or apprehension.

ETYM Latin anxius, from angere to cause pain, choke; akin to Greek agchein to choke. Related to Anger.
1. Causing or fraught with or showing anxiety; SYN. nervous, uneasy, unquiet.
2. Mentally upset over possible misfortune or danger etc; worried; SYN. apprehensive.
3. (Colloquial) Eagerly desirous; SYN. dying.

ETYM Colloq. Eng.
1. In a state of cowardly fright.
2. (Of jazz) Having the soulful feeling of early blues; SYN. low-down.