full of (e.g. mistakes); riddled with; covered all over with (blood, mud, etc.)
natural; reasonable; obvious; usual; common; ordinary
level; standard; level (plane); floor; spirit level; (surveyor's) level
strangeness; abnormality; disorder
patrolling; one's rounds; inspection tour; watchman; patrolman
to fall behind; to drop out; to drop; to fall; to spill
study; diligence; discount; reduction
reverse; opposite; converse (of a hypothesis, etc.); inverse (function)
physical education; PE; gym (class)
simple; easy; uncomplicated; brief; quick; light
anticlimax; let-down; disappointment; loss of interest
dangerous; in danger; facing imminent danger; precarious (situation); perilous (state, balance, etc.); in doubt
to throw down; to bring down; to kill; to defeat; to overthrow; to trip up
to see through; to see into (someone's heart, mind, etc.); to perceive; to find out; to detect
puzzling; tangled; complicated; complex
severe; harsh; hard; cruel; rigorous
roundabout (e.g. expression); indirect (reference, criticism, etc.); oblique
being left out; being ostracized
case (e.g. receptacle, condition, event, legal action, letter style, etc.); Computer-Aided Software Engineering; CASE
surface; face (i.e. the visible side of an object); front (of a building, etc.); obverse side (i.e. "head") of a coin; outside; exterior; appearance
to come together; to merge; to fit; to match; to be profitable; to be equitable
from the standpoint of; as a matter of (e.g. fact); aboard (a ship or vehicle); on top of; first volume (e.g. book); superior quality; best
minimum; at the very least
grasp; catch; understanding
hour; o'clock; (specified) time; when ...; during ...
judging from; on the basis of; from the point of view of
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
to show contempt for; to look down upon; to have a low opinion of; to cause to fall; to make decline
to think (something) is improper; to question; to have a problem with
to rot; to go bad; to corrode; to weather; to become useless; to blunt; to become depraved
to answer; to fire back; to retort; to redo; to do over; to try again
uninterested; unconcerned; plain; light; flowing gently
to forge; to temper; to drill; to train; to discipline
stoic; stoical; self-disciplined; abstemious; Stoic (philosopher)
good feeling; good will; favourable impression; favorable impression
unusual event; strange occurrence; strange phenomenon; something abnormal; change (for the worse); accident
infiltration; sneaking in; going undercover
clue; lead; key; handhold; hold
end; verge; extremity; miss; failure; blank (e.g. lottery ticket)
conviction; belief; confidence
usual; ordinary; normal; regular; general; common
to wait for one's chance; to wait for an opportunity
to hear; to listen (e.g. to music); to ask; to enquire; to hear about; to hear of; to follow (advice, order, etc.)