interrogative
adj.
c.1500, from Late Latin interrogativus "pertaining to a question," from Latin interrogat-, past participle stem of interrogare "to ask, question" (see interrogation) + -ive.
〔李〕[interrogat（ ←interrogate）v. 讯问，质问；-ive →] a. having the quality or form of interrogating；asking a question讯问的；疑问的