barrier; protective wall; obstacle; hindrance; imaginary shield that gives one invincibility or immunity
to fall to one's knees; to go down on one's knees (e.g. to express respect)
unfortunately; sorry, but ...
passing through (of a tunnel, bullet, etc.); going (right) through; penetrating; (arch.) being well versed (in)
special characteristic; special quality; trait; idiosyncrasy; peculiarity
reflection (of light); reflection (of society, attitudes, etc.); application (of an update, changes, etc.); taking effect
form (in Aristotelianism); idea (in Platonism)
to mince; to cut fine; to carve; to engrave; to tick away (time); to beat out (e.g. rhythm); to etch (into one's mind)
through (e.g. an intermediary, a medium); via; over (e.g. a network); across; by way of; by means of
dawn (of a new era, civilization, etc.); dawning
nuclear fission; karyokinesis (division of a cell nucleus during mitosis or meiosis)
disaster; accident; calamity; catastrophe
cannot be avoided (of a problem, etc.); unavoidable; inevitable
theme; topic; subject matter; motif; project; slogan
groping (for); fumbling around (for); searching (for an answer, solution, etc.); trying to find
has never (done, occurred); there has never been an instance (where); there is no precedent (for)
reconstruction; reorganization; reorganisation; reconstitution; reconfiguration
reaching; attaining; arrival
dissemination; scattering; sprinkling; spraying
gas; vapour; vapor; gaseous body
permeation (of thought, ideology, culture, etc.); infiltration (e.g. of ideas); permeation (of a liquid, etc.); soaking; osmosis
sound wave; acoustic wave
gravitational wave; gravity wave
to insert; to include; to incorporate; to install; to embed
defeat; loss; failing to live up to (one's name, looks, etc.); discount; loss (on a sale)
surrender; submission; capitulation; being defeated (e.g. by a problem); giving up; giving in
binoculars; field glasses
being amazed; being horrified; being taken aback
crash; smashing (into); ramming; clash (of views, interests, teams, etc.); conflict
to weaken; to grow weak; to be downcast; to be dejected; to be troubled; to be at a loss
to plan; to form a plan; to scheme; to envision; to intend to do
(switched) on; being on the green (of one's ball)
waiting (for); expecting; standby screen (on a mobile phone); (phone) wallpaper
radio wave; reception; signal; saying strange things
tool; implement; means; furniture
care; precaution; guarding; caution
unsafe; insecure; careless; dangerous; incautious; imprudent
reply (e.g. email, fax, letter); answer