Finnish and Estonian are closely related languages.
The borderline between East and West Berlin was very closely guarded.
The chairs are too closely spaced.
Dean spent the remainder of the workday sorting reports and more closely reviewing the Byrne papers.
He didn't expect a reply and started forward, trailed closely by Yully.
He looked more closely and saw that it was an ant.
Jule trailed as closely as he dared.
You're either lying or not looking closely enough.