How to say "Mere" in Japanese

When translating "mere" into Japanese, you must choose carefully between 一介 and 単なる. In Japanese, 一介 (いっかい (ikkai)) is typically associated with "a mere; a humble; an ordinary (person)" (Syllabus Level: N1) and represents Used to refer to oneself or others as a 'mere' or 'humble' individual, emphasizing their lack of special status, power, or influence. It conveys a sense of modesty or insignificance. Often followed by の and a noun indicating one's role or status. On the other hand, 単なる (たんなる (tannaru)) maps to "mere, simple" (Syllabus Level: C1) and represents Essential structural term in CEFR C1 vocabulary syllabus.. A literal translation of "mere" can often sound unnatural to native Japanese speakers if mixed up!