optional; voluntary; arbitrary; arbitrary
legal force; legally binding force; compelling power; compelling force
refusal; rejection; denial; veto
to get (information) out of someone; to extract (information) from someone; to find out (through questioning); to begin listening (to)
stubbornness; obstinacy; disposition; nature; appetite; desire
deviation; departure; (accidental) omission
to benefit; to profit; to gain; to reap rewards
attachment; adhesion; insistence; tenacity; fixation; obsession
ought to do; have to do; must do; feel obliged to
to weaken; to grow weak; to be downcast; to be dejected; to be troubled; to be at a loss
kind; sort; type; equal; match; peer
to slip out; to steal out; to excel; to stand out
footprints; record of page visitors (e.g. in social networking sites)
to follow (a road, path, etc.); to trace; to follow (a clue, scent, tracks, plot, etc.); to trace (a route, history, family tree, etc.); to head towards (of a situation); to go in the direction of
meeting (face-to-face); seeing; visit; interview
medical examination (for a specific condition or disease); health screening
station; office; guardroom
to cross (e.g. road); to traverse
front entrance; front door
closing; closure; shutdown; lockout
first-aid; emergency (aid)
guard; security guard; security officer
going in and out; entering and exiting; visiting regularly; frequenting; income and expenditure; incomings and outgoings; increase and decrease
four-digit number; thousands column
often; again and again; over and over again; repeatedly; frequently
combination; assortment; matching (in a contest); pairing; combination
to try (out); to have a try (at); to test; to put to the test
previous day; day before; eve; prior day; preceding day
to take (a resource, e.g. time or money); to hang; to come into view; to arrive; to come under (a contract, a tax); to start (engines, motors); to attend
outdoor unit (esp. air conditioner condenser)
tank (of fluid); cistern; vat; tank (military vehicle)
to collect; to gather; to arrange; to put in order; to make uniform; to make even
given the situation; now that it has come to this; if it comes to this
to jump down; to leap down; to jump off; to leap off