• 斜ななめ — diagonal / slant
• 斜面しゃめん — slope / incline
• 傾斜けいしゃ — tilt / slant
• 斜線しゃせん — diagonal line
• 斜陽しゃよう — setting sun

斜 shows a sense of things leaning or slanting. With the radical 斗 (ladle), it suggests tilting or pouring. Combined with 余よ, it points to something “off-center” — not upright, but diagonal.