コウ, キョウ, ふさぐ, やまにれ, おおむね
for the most part, close up, flower stem
JLPT0 G7 S11 F5000
As per 更# (stretch) + 木 tree/wood → long *branch* or piece of wood → *stalk*; *stem*. Also, *block* (with a wooden bar). *Almost entirely* is a borrowed meaning.
[Full Kanji Etymology List]