sighs is a form of:

Arbor vitae



noun
1.
(វេជ្ជសាស្ត្រ) រចនាសម្ព័ន្ធរបស់ខួរក្បាល ឬរបស់ផ្ទៃដែលមើលទៅហាក់ដូចជាដើមឈើ
ENGLISH MEANING
1.
An evergreen tree of the cypress tribe, genus Thuja. The American species is the T. occidentalis.
2.
The treelike disposition of the gray and white nerve tissues in the cerebellum, as seen in a vertical section.