moisture; humidity; dampness
guidance; leading; induction; introduction; incitement; inducement
speaking of ...; when it comes to ...; as for ...; if one were to say ...
immediate (effect, result, etc.); instant; instantaneous; prompt
opposition; rivalry; competition; antagonism
advanced level; high grade; senior
of established reputation; fully established; (universally) recognized; acknowledged; leading
highest grade; superlative degree
excelling; surpassing; outdoing
disturbance; perturbation; derangement
if (it) doesn't exist; if there is no ...; if not ...; unless ...; have to ...; must ...
severe; strict; hard (to do); difficult; intense (e.g. cold); harsh (weather)
to take someone (to some place); to take someone along; to lead someone away
spare time; free time; time (e.g. time it takes to do something); time off; day off; quitting (one's job); firing someone
leaving somebody behind; abandoning someone; marooning someone
to make someone eat; to deal (a blow); to play (a trick)
toot (e.g. of trumpet); honk (e.g. of klaxon); beep; farting sound; sound of something being inflated; puff
secret; secrecy; mystery; secret (e.g. to success); esoteric teachings
invalid; void; ineffective; unavailable
resistance; opposition; obstruction; (electrical) insulating coating; insulating varnish
hardening; vulcanization; hardening (of attitude, stance, etc.); stiffening; upturn (in the market); firming up
isolation; cut off; blockade; quarantine; interception; deprivation
learning; acquisition (of a skill, knowledge, etc.)
blow; shock; strike; batting
ideal; perfect; most suitable; just right
very; considerably; by no means; not readily; middle; half-way point
strength; intensity; strong (e.g. glasses); powerful (e.g. lens); intense (e.g. fear)
skill; dexterity; proficiency
inside; interior; inner part
in use; occupied (e.g. toilet); engaged
tough; hard; determined; strong-minded; strong (e.g. sunlight, alcohol); severe
resistance (e.g. to antibiotics); tolerance (e.g. drug tolerance)
trump card; ace up one's sleeve; secret weapon
the place for; the time for; the level of
to make a mistake (in); to commit an error (e.g. in calculation); to confuse; to mistake something for something else