ショウ, なお, たか, たかし, ないし, なり, ひさ, ひさし
esteem, furthermore, still, yet
JLPT1 G7 S8 F1531
The relevant seal inscription form is as per 向# (be compressed through a window or hole) + 八 split right and left → rising air that disperses through windows or ventilation holes set off to right and left → *respect* (← look up to ← rise); *besides* (above and beyond). In derivative characters, 尚 may appear in the form seen for example in 倘, 徜 and 敞.
[Full Kanji Etymology List]