hygienic; healthy; healthful; sanitary
one-by-one; separately; in detail
perplexity; difficult question; difficult problem
clear; clearing (a bar, hurdle, etc.); overcoming; getting through; clearing (the ball); clearing (e.g. a checked box)
to pass; to elapse; to pass through; to go through; to experience; to go through
steering; piloting; flying; management; handling; control
following (a precedent, former policy, etc.); continuing with; sticking to; observing
dryness; aridity; drying (e.g. clothes); insipidity
to burn; to kindle; to heat (a bath); to light (a stove); to use (a camera flash)
to step into (e.g. someone else's territory); to break into; to raid; to come to grips with; to get to the core of
accelerator; accelerator pedal; gas pedal
at the most; at best; to the utmost; as much as possible; as much as one can
heavy; weighty; heavy (feeling, atmosphere, etc.); serious; gloomy
to loosen; to slacken; to relax (attention, efforts, etc.); to let down (one's guard); to relax (a rule); to ease (e.g. restrictions)
railroad; railway; rail transport
with a crack (e.g. branches, knuckles)
to break; to be smashed; to split; to crack; to be divided (opinion, vote, etc.); to split (e.g. of a party); to come to light
laying (a railroad, pipes, naval mines, etc.); construction
limiter (electronics); (speed) limiter
cancellation; rescinding; release; calling off; lifting (sanctions); delisting
untrodden (region, field of study, etc.); unprecedented (discovery, achievement, etc.)
proving ground; test site
estimate (of costs); budget
generally; in the main; (more or less) everything; all parts; ordinary; usual
oral; verbal; spoken; parol
document; writing; letter; document addressed to someone
presentation (of documents); submission (of an application, report, etc.); production (e.g. of evidence); introduction (e.g. of a bill); filing; turning in
making practical; making useful; implementing
accumulation; accumulate; store
brow; glabella; middle forehead; area between the eyebrows
to wrinkle up (one's eyebrows, one's nose); to furrow; to crimple
to bite at; to snap at; to jump at (e.g. an offer); to snap at; to hold on to; to cling to
to negotiate (with someone about); to talk over (something with); to tackle someone (about); to throw on each other; to splash (water) on each other; to pour on each other
route; road; distance travelled in a day; one's ... (age, e.g. 40s, 60s)
means of transportation; means of transport