on a horse’s saddle; (by extension) on a horse

to keep up; to retain / to maintain

the above / the top (position or direction) / the surface of / superior in skill, age, level, etc.

in addition; furthermore / on top of (which)

saddle

saddle

saddle

balance (condition of a system in which competing influences are balanced)

to be balanced

he / distal demonstrative, something far off removed from both speaker and listener: that / boyfriend