doping (in sports); doping (of a semiconductor)
hollow; cavity; hole; cave
(undesirable but) inseparable relationship
item; heading; category; headword (in a dictionary, encyclopedia, etc.); entry
one-by-one; separately; in detail
stage; step; level; rank; order; stairs
many; much; plenty; hardly
3rd day of the month; three days
greenhouse; hothouse; conservatory; glasshouse
laboratory; seminar room; professor's office
orphan; person without friends
three; three years of age
sterilization; sterilisation
some; any; in any way; of some kind; of some sort
incomparable; cannot compare (with); beyond comparison; in another league
and; or; and the like; and so forth; and what not
and yet; despite this; but even so; but even then; however; nevertheless
to damage; to do harm; to disadvantage
excessive; too much; unreasonable
unclear; indistinct; obscure; opaque; inarticulate; dim
to act first; to act precipitously; to be rash; to get ahead of oneself; to jump the gun
source; origin; birthplace; release from prison; discharge from prison
small change; pocket change; coins; small sum of money
to swipe; to nick; to pilfer; to greedily try to win big (e.g. in mahjong)
groundless (rumour, accusation, etc.); unfounded; baseless; without a shred of truth
unexpectedly; surprisingly
one cup (of); one glass (of); one drink (of alcohol); full; filled (with); fully; to capacity
to go upstream; to go up (a river); to go back (to the past or origin); to date back (to); to trace back (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 look at again; to re-examine (policy, estimate, plan, etc.); to review; to get a better opinion of; to see in a more positive light; to improve
club; fraternity; sorority; clubhouse
champion of justice; knight in shining armor; crime avenger; hero; super hero
immediately; at once; instantly