difficult to ...; hard to ...
doctrine; rule; principle; -ism
granny; grandma; gran; old lady; old woman
to start (something); to start up; to boot (a computer); to launch (a business)
library; book series; library (software, modules, images, etc.)
bubble; foam; froth; head on beer
to press against each other; to huddle together
caption (photo explanation, video subtitle, headline); legend; cutline
flick (hockey, fencing, touch-screen, etc.)
tag; label; game of tag; tag-team match; working together as a team
sharing; share (on social media); market share
to speak frankly; to put things bluntly
startup; booting up; activation; starting (e.g. engine, computer); launch
smooth (skin, etc.); sleek; velvety; silky
stamp; sticker (in messaging apps); (large) emoji
it's not like; it isn't as if
to start working; to take action
previously; already; for some time; for quite a while
to understand from experience
regarding highly; attaching importance to
noninterference; leaving something to take its own course; giving someone a free hand with something
swiftly; rapidly; suddenly; abruptly; sharply (of a slope, bend, etc.); steeply
to set one's mind on doing; to get the idea of doing; to make up one's mind
to think of; to come up with
only natural; no wonder; as expected; of course; as it should be
suit (clothing); suit (playing cards)
commandant; commanding officer; general
sweet tooth; love of sweet things
rough; crude; sloppy; miscellaneous
close examination; careful investigation; investigation of a crime; inquiry into someone's guilt; winner (of the most rounds, i.e. a full game); (arch.) reciting and appreciating traditional poetry
coloring; colouring; color scheme; colour scheme; (touch of) colour; embellishment
more than anything; above all else
spring; springtime; New Year; prime (of life); height (of one's prosperity); adolescence
high praise; great admiration; rave reviews
to mount (animal behaviour); to assert dominance
journalization (accounts); journalisation; bookkeeping
qualifications; requirements; capabilities
self-education; self-instruction; self-study
class (e.g. school); grade; rank; kyū; kyu; junior rank in martial arts, go, shogi, etc.
to assign; to allot; to allocate; to divide among; to distribute; to prorate