hard; solid; stiff; tight; strong; firm (not viscous or easily moved); safe
compression; condensation; constriction; compaction
layer; stratum; class; stratum; sheaf; counter for stories (of a building)
upper stratum (classes, stories, storeys); upper layer; layer above
elementary level; beginner level
textbook; coursebook; schoolbook
model; dummy; model (profession); fashion model; model (of a vehicle, machine, etc.); version; model (e.g. mathematical)
typical; representative; archetypal; quintessential; stereotypical; model
solid (body); solid matter; solid-state
minus; negative (quantity); deficit; disadvantage; drawback; negative (ion, pole, growth, image, effect, etc.)
main; principal; main dish; main course; main part; principal part
lightning; electric illumination; light from an electric source
origin; source; beginning; starting point
chaos; confusion; disorder; chaotic; confused; uncertain
coworker; co-worker; colleague; associate
staff officer; military staff; adviser; counselor; counsellor
left-wing (politics); left wing (of a bird, aircraft, formation, etc.); left flank; left field
right-wing (politics); extreme right-wing group; right wing (bird, plane, etc.); right field; right flank; right fielder; high rank
natural (physical) environment
three dimensions; three dimensional; 3D; real world; IRL (in real life)
to surround; to crowd around
orderly; regular; systematic; well-organized; well-organised; trim
(not) particularly; (not) especially; (not) very; (not) much
grateful; thankful; welcome; appreciated; evoking gratitude
first day of the month; (arch.) first ten days of the lunar month
those present; attendance
rude; outspoken; presumptuous; cheeky
to pat (e.g. dog); to rub; to stroke; to fondle