barrier; protective wall; obstacle; hindrance; imaginary shield that gives one invincibility or immunity
having a loose tongue; being talkative; speaking without thinking; being unable to keep a secret
infringement (of a law, treaty, etc.); contravention; conflict (with a theory, claim, etc.); inconsistency; (arch.) collision; (arch.) contact
country; territory; domain; realm
inspection; reading; perusal; browsing (the web)
surrounding countries; neighboring countries; neighbouring countries
high-tech; high-technology
outline; summary; overview; synopsis; abstract; abridgment
like that; that way; thus
difficult to understand; unintelligible; abstruse
public and private; official and personal; government and people
plant and equipment; production equipment; productive capacity
to flip; to snap; to repel; to use (an abacus); to calculate; to strum
tree (e.g. Christmas); tree structure; tree diagram
dynamic lift; lifting power
sailing ship; sailing boat; sailing vessel
fluid mechanics; fluid dynamics; hydrodynamics
internal combustion engine
to overestimate (someone); to overrate; to think too highly of; to make too much of; to give (someone) too much credit
garbage disposal; refuse disposal; waste treatment
embodiment; materialization; actualization; realization; taking form; taking shape
beginning; clue; starting point
to coagulate; to curdle; to be fanatical; to be obsessed with; to stiffen; to become stiff
with profound (often hidden) meaning; pregnant with significance; meaningful; suggestive; interesting
to lurk; to be hidden; to be concealed; to lie dormant; to be latent
suddenly; abruptly; deliberately; slowly; gently
solid (body); solid matter; solid-state
conditions of a location; suitability of a location; convenience of a location
rock; boulder; crag; cliff; anchor
to gain time; to play for time; to buy time
circuitous; roundabout; indirect