週末、川辺でピクニックした

N3 週 shuu week N3 末 sue end, tip, future N5 川 kawa river N5 辺 hen area, vicinity N3 ピクニック pikunikku picnic

N4 週 shuu week, semaine, semana N3 末 matsu, batsu / sue, ura, ure end, close, tip N5 川 sen / kawa stream, river, river or three-stroke river radical (no. 47) N2 辺 hen / ata.ri, hoto.ri, -be environs, boundary, border

N4 〜し shi Indicates multiple reasons or qualities, connects clauses or adjectives, means besides that, and also N5 〜で de Indicates where an action happens, means used, tool, cause, or material depending on context