When I visited the village museum, I learned that the family name Ackerman originally indicated an ancestor who worked as a ploughman.

The Ackermans invited us to their annual summer barbecue.

Researchers studying Ackerman syndrome have documented families with taurodontism, hypotrichosis, a full upper lip lacking a Cupid's bow, a thickened and wide philtrum, and occasional juvenile glaucoma.

Mr. Ackermann presented his research on medieval farming at the symposium.

When studying computability, I was fascinated by how the Ackermann function grows faster than any primitive recursive function despite its simple definition.