to be due to; to be caused by; to depend on; to turn on; to be based on; to come from
difficult to ...; hard to ...
to leave one's seat; to temporarily excuse oneself (from a meeting, etc.); to step outside; to be away (from one's desk, etc.)
to call out (to); to call; to summon (a doctor, etc.); to invite; to designate; to name; to garner (support, etc.)
to faint; to be exhausted
never mind that; don't worry about that; listen up
awkward; clumsy; stiff; crude; unrefined; constrained
to lean on; to recline on; to rely on; to depend on
originally; primarily; essentially; intrinsically; proper; rightful