an incisivus labii inferioris muscle

counter for horses, mules, and small animals / a measure of cloth / foot (rare) / counter for rolls of cloth

足早: brisk, swift-footed, fast-paced

(manga) Short for アシスタント (ashisutanto, “assistant”).

(lit. one eye, two legs/feet, three courage, four power) "first, eyes, second, feet, third, courage, fourth, power". The essentials of [kendo] in descending order of importance