practical question (problem)

Kyūjitai form of 応用: application

Kyūjitai form of 応用: to apply

use (noun) / a task, business, an errand

Kyūjitai form of 応

practice (as opposed to theory) / actual condition, actuality / status quo

indeed, in fact, actually

virtually; practically; in practice; currently; presently

question, problem on homework etc. / a question; a matter (of time etc.) / a problem (something that needs to be dealt with); a trouble / an issue; a matter

a theory