studiously is a form of:

Studious



adjective
1.
(Involving study, deliberate painstaking, showing close attention, zealous) ដែលសំភី, ឧស្សាហ៍, ដែលផ្ចិតផ្ចង់
Example: A studious attention to detail, with studious politeness.studious student ដែលឧស្សាហ៍រៀនសូត្រ, studious care ដែលយកចិត្ដទុកដាក់, ដែលផ្ចិតផ្ចង់
ENGLISH MEANING
adjective
1.
Planned with study; deliberate; studied.
2.
Given to study; devoted to the acquisition of knowledge from books; as, a studious scholar.
3.
Given to thought, or to the examination of subjects by contemplation; contemplative.
4.
Earnest in endeavors; aiming sedulously; attentive; observant; diligent; -- usually followed by an infinitive or by of; as, be studious to please; studious to find new friends and allies.
5.
Favorable to study; suitable for thought and contemplation; as, the studious shade.