丸木 is read as まるき (maruki) and means log.
まるき
maruki
まるばのき
Disanthus cercidifolius (species of witch-hazel)
まるきばし
log bridge
まるきづくり
rustic work
まるきぶね
dugout canoe
まるい
curved
まるみ
mellowness
まるまる
entirely
まるめる
to lump together
まるほん
reciter's book
まる
circle
まるで
as if
to become rounded