Anxiety meaning

a feeling of worry, nervousness, or unease about something with an uncertain outcome

a nervous disorder marked by excessive uneasiness and apprehension, typically with compulsive behaviour or panic attacks.

strong concern to do something or for something to happen.

Intense, excessive and persistent worry and fear about everyday situations. Fast heart rate, rapid breathing, sweating and feeling tired may occur.

Similar words, 

• eagerness
• keenness
• desire
• impatience
• longing
• yearning