it's OK to ...; it's best to ...; it's alright to ...
to stare back at; to look back at
to look back on (the past); to reflect on; to look behind (at); to turn round (and look); to consider; to concern oneself about
to be involved (in); to get involved (in); to relate to (a matter); to pertain to; to (seriously) affect; to concern
hem; (trouser) cuff; bottom part; bottom edge; foot (of a mountain); tips (of hair)
to turn over; to change (one's mind); to reverse (one's decision); to fly (a flag); to let (a skirt, cape, etc.) flap in the wind
novice; beginner; starting to run; running off; running away
to become quiet; to quiet down; to quieten down; to calm down; to die down; to subside
in succession; one by one
high and low; rise and fall
difference in elevation (between two points in a body of water); head; drop (e.g. of a waterfall); difference; gap
protuberance; bulge; protrusion; rise; uplift; upheaval
to be disconnected; to get out of place; to miss the mark; to get it wrong (e.g. guess, expectation); to be removed; to be excluded
a short while ago; just now; already; for a long time
to check; to hold back; to keep at bay; to stop; to prevent; to stem
to shake; to swing; to sway; to shock
to be closed; to be blocked; to be clogged; to be plugged up; to be occupied; to be taken (e.g. accommodation)
to descend; to go down; to be handed down (of an order, judgment, etc.); to pass (of time); to surrender; to capitulate; to be less than
water pressure; hydraulic pressure
emission; release; radiation; release (of goods, a player from a team, etc.)
travelling (a long and difficult journey) on foot; walking (all the way) across; travelling through; travelling all over (e.g. a country); visiting all the major locations (of a region, etc.)
to find out; to discover; to locate
main point; essential point; important thing; necessity; need; requirement
to become muddy; to become cloudy; to become dull (of a sound, color, etc.); to become indistinct; to become impure (of one's heart, a society, etc.); to be corrupted
precious stone; jewel; gem
to fit; to get into; to be fit for (a job, etc.); to be suited for; to fall into; to plunge into
to press against; to push against; to force against; to foist on (task, responsibility); to impose (one's will)
to persevere; to persist; to insist that; to stick to (one's opinion); to remain in a place; to stick to one's post
to quiet (a child, crowd, etc.); to quieten; to calm (one's nerves, excitement, etc.); to compose (oneself); to suppress (a rebellion, riot, fire, etc.); to quell
to boost; to force up; to push up
to beat fast (of a heart); to hammer
shortness of breath; panting; puffing; running out of steam (of the economy, a project, etc.); losing momentum; loss of efficiency
leisurely; slow; deliberate; easygoing
conscious; deliberate; intentional
to proceed with things; to carry out; to do
breaking through; breakthrough; surmounting (a difficulty); overcoming; exceeding; passing
at a stroke; with a single swoop
large hole; big deficit; heavy losses; long-shot win (in horse racing, etc.); big winnings (on a long shot)
to empty; to remove; to move out; to clear out; to be away from (e.g. one's house); to leave (temporarily); to dawn
losing oneself (in); being absorbed (in); forgetting oneself
to get dirty; to become dirty; to become sullied; to become corrupted; to lose one's chastity
to stick to; to cling to; to adhere to
possibly; by some possibility; perhaps