How to say "Strong" in Japanese

When translating "strong" into Japanese, you must choose carefully between たくましい and 堅牢. In Japanese, たくましい (たくましい (takumashii)) is typically associated with "strong, robust, tough (physically/mentally), sturdy" (Syllabus Level: N2) and represents Describes a person or organism that is strong, resilient, and vigorous, both physically and mentally. Often implies an ability to overcome hardships.. On the other hand, 堅牢 (けんろう (kenrou)) maps to "strong; sturdy; robust; durable" (Syllabus Level: N1) and represents Describes something physically very strong, resistant to damage, and built to last for a long time. Often used for structures, materials, or systems.. A literal translation of "strong" can often sound unnatural to native Japanese speakers if mixed up!