na-adjective, noun which may take the genitive case particle 'no'
Formal or written adjectival use, typically modifying nouns such as 処置, 措置, 方法, or 対応; 適切 is often the plainer everyday equivalent.
The doctor's appropriate treatment brought the symptoms under control.
It is necessary to take suitable measures according to the situation.
appropriately; as needed; at one's discretion
Common in instructions, business, and official writing. As an adverb, it means to do something suitably as circumstances require; the noun use is usually bound up with this adverbial function rather than a concrete object.
We will update the materials as needed.
Please take breaks at your own discretion.
Please distribute the materials as needed.
Please use your own judgment based on the situation.
We took appropriate measures on the spot.