is not; am not; are not; isn't it?
field; field; meadow; field (of interest, study, etc.); field; field (in a form, web page, etc.)
very; considerably; by no means; not readily; middle; half-way point
difficult to understand; difficult to grasp; confusing; puzzling
beard (esp. on the chin); goatee
cup (drinking vessel, measure, brassiere, prize, etc.)
(program of) entertainments; special events; exhibitions; amusements; attractions
voluntary; optional; free; elective
at that (very) moment; just then
time; season; period; phase; stage
jostling; milling about; crush; packed with (activities, products, etc.); teeming with; chock-full of
commencing with; including
main constituent; core; nucleus; subject
soon; shortly; before long; nearly; almost
established practice; custom
dungeon; dungeon (in an RPG or video game); (underground) labyrinth
search; lookup; hunt; (item of) research; exploration; investigation
academic year; school year; year in school; grade in school
one by one; each; every; at intervals of
intended for ...; oriented towards ...; aimed at ...
to play a leading role; to play a central part
actual place; actual location; the spot; place where one is currently living
strength; power; proficiency; ability
intermediate student; intermediate learner; intermediate practitioner
to touch; to feel; to touch (with); to experience; to come in contact with; to touch on (a subject); to allude to
absurd; unreasonable; rash; reckless; excessive; immoderate
having said that; on the other hand; (but) then; (but) still
change; alteration; difference; distinction; something wrong; abnormality
injured person; wounded person
several years; a few years
dead person; (the) deceased; (the) dead; casualties
to dive (into or under water); to get under; to get into; to hide oneself (esp. from the government); to conceal oneself
goods; materials; commodities; resources; supplies
supply; provision; raising; procurement
means of transportation; transport service
procedure; process; proceedings; formalities
(if) by some chance; by some possibility; in the unlikely event that; (unlikely event of) emergency; the worst(-case scenario)
to hinder; to obstruct; to disrupt; to interfere with; to cause a delay
depending on the situation; depending on circumstances