concentration; thickness; density; cardinality
deep (colour); dark; strong (flavour, smell, etc.); thick (consistency); dense; strong (possibility, etc.)
I see; that's right; indeed
to attempt; to test; to try out
at once; immediately; without delay; promptly
medium; mediocrity; average
substance; essence; real (in economics, vs. nominal, e.g. real interest rate); substantive; substantial
to become possible; to become able to (do)
first; foremost; most important; best; greatest; above all
number; edition; sobriquet; pen-name; size (of printing types, canvases, knitting needles, etc.); suffix attached to names of ships, trains, airplanes, etc.
on good terms with; on cordial terms with; getting along well with; to make friends with; to be good friends with; to get along with
to finger; to touch; to make changes to; to tinker with; to dabble in; to do as a hobby
enjoyable; fun; pleasant; happy; delightful
seeming; giving the appearance of; giving one the feeling of
to get along (with someone); to be like-minded; to be congenial
close; intimate; on good terms
interior; inside; internal
institution; establishment; facility; home (for elderly, orphans, etc.)
atmosphere; mood; a certain air; presence; (Earth's) atmosphere
glittering; sparkling; glistening; twinkling
heresy; evil ways; sorcery; black magic; netherworld; world outside the six realms where evil spirits roam
to have a taste for; to be fond of; to enjoy (in moderation); to be modest; to be prudent; to watch (e.g. one's behaviour)
to attack; to assail; to succeed (someone in a post, role, etc.); to make a sudden visit
leaving a decision to someone else (often of a meal to be selected by the chef); omakase
to be (animate); to be; to be ..ing; to (have the audacity to) do
reliable; trustworthy; hopeful; promising
worry; concern; anxiety; care; help; aid
tune; tone; vein; mood; condition; state of health
riding; ride; spread (of paints); -seater (e.g. two-seater); (getting into the) mood; (entering into the) spirit
calmness; composure; presence of mind; stability; steadiness
to come together; to merge; to fit; to match; to be profitable; to be equitable
therefore; for that reason; such being the case
hole; opening; pit; hollow; burrow; den; deficit
to dig; to excavate; to delve into; to dig up (e.g. vegetables); (for two men) to have anal sex
laboratory; seminar room; professor's office
making a round trip; going and returning; round-trip ticket; return ticket; correspondence; exchanging (letters)
door; gate; opening; title page
inside; interior; inner part
putting into operation; invocation
exterior; outside; outer; external; lateral
hall; saloon; spacious room; reception room
once; before; formerly; never yet; never before; first time