問う

This verb is significantly more formal and weighty than the common verbs for "asking," such as 聞く (kiku) or 尋ねる (tazuneru). While those verbs are used for general inquiries, 問う is typically employed in formal, legal, or philosophical contexts where the answer sought is fundamental, critical, or carries a sense of interrogation.

When used in the sense of "holding someone accountable" (e.g., 責任を問う), it implies a demand for a justification or a penalty. It is not a casual question but a formal challenge to someone's responsibility or qualifications.

A very common pragmatic usage occurs in the negative form 〜を問わない (wo towana-i), meaning "regardless of" or "no matter the...". This is frequently seen in job advertisements or official requirements to indicate that a specific criterion (such as age, gender, or experience) is not a limiting factor for eligibility.