inquirer

The word 'inquirer' is built upon the verb 'inquire', which entered English from Old French 'enquerre', itself derived from Latin 'inquirere'. This Latin verb is a compound of the prefix 'in-' (meaning "into") and 'quaerere' (meaning "to seek, ask"). The core semantic logic is of seeking information by looking into a matter. The agent suffix '-er', of Germanic origin, was later attached to form the noun, designating the person who performs the action of inquiring. Thus, an inquirer is literally "one who seeks into" a subject to gain knowledge or truth.

Structure: in (into) + quir (ask) + er (agent suffix) - in: Latin origin, a prefix meaning "into, in, on, upon". - quir: A variant of the Latin root 'quaerere' (to ask, to seek), as seen in the English spelling of 'inquire'. - er: Old English origin, an agent noun suffix meaning "a person or thing that does something".