boy, priest's residence, priest
JLPT0 G7 S7 F1832
As per 方# (spread) + 土 earth → earth spread to create an embankment (compare 壩). Originally the same as 防, but 坊 eventually was applied to the idea of streets divided into squares → *town* → *residences* (of princes, priests, artisans etc.) → *priest* → *young boy* (← acolyte).
[Full Kanji Etymology List]