birthdays is a form of:

Industrious



adjective
1.
(diligent, assiduous, hardworking, sedulous, busy, zealous) ដែលឧស្សាហ៍ធ្វើការ, ដែលខំប្រឹង
2.
(FIGURATIVE) ដែលខំផ្ចិតផ្ចង់, ទៀតទាត់ (ចំពោះការងារ) / ឱហាត
Example: The ant to an industrious insect.
ENGLISH MEANING
adjective
1.
Given to industry; characterized by diligence; constantly, regularly, or habitually occupied; busy; assiduous; not slothful or idle; -- commonly implying devotion to lawful and useful labor.
2.
Steadily and perseveringly active in a particular pursuit or aim; as, he was negligent in business, but industrious in pleasure; an industrious mischief maker.
1.
active, assiduous, busy, diligent, hardworking intent, patient, persevering
1.
careless, indifferent, lethargic, unconcerned