anthill
nounUK /ˈænthɪl/
US /ˈænthɪl/
A little mound of dirt that ants build on the ground where they live.
The children watched the ants marching in and out of the anthill.
OTHER MEANINGS
2. A small heap or mound of earth resembling an anthill.
A little anthill of sand had piled up around the drain.
3. A busy, crowded place full of activity.
The market was an anthill of shoppers by noon.
4. A term for a small, insignificant obstacle or problem.
Don't make an anthill out of a molehill.