Mystery Word Clues

We are behind on mystery word. We will reveal the word tomorrow! We finished clues today for last week's mystery word. Here they are:
1. five letter adj. that begins with "a", I describe something that can move quickly and easily. 2. I am similar to words such as nimble, quick, and spry. 3. I am not clumsy or stiff. 4. I can fit in the following sentence- The ______________ little boy slipped through the hole in the fence and disappeared in an instant.