swimming area (in the ocean); swimming beach; seawater baths
to close up; to shut up (e.g. behind doors); to cut off (e.g. because a deadline has expired); to close off (e.g. subscription list)
gloomy; melancholy; pessimistic; luxuriant (of vegetation)
speaker; lecturer; lecturer (at a university or college); instructor; part-time teacher; tutor (at a cram school)
differentiation; differential; derivative
to overturn; to capsize; to overthrow (government etc.); to reverse (decision etc.); to disprove (an established theory etc.)
spherical surface; sphere
complex; complex (number)
three dimensions; 3D; 3-D; real world; IRL; in real life
Kaehler; Kahler; Kehler; Kehrer
as if; as it were; as though; right then; just then; at that moment
fourth dimension; four dimensions; 4D
reduction (in size); shrinking; minimization; trivializing (an issue); making light of; playing down
friend; companion; comrade; accompaniment; companion (e.g. book); complement
continuous transformation; continuous mapping
reconstruction; rebuilding; restructuring
to plan; to plot; to attempt (e.g. suicide, murder); to undertake (e.g. business); (arch.) to stand on tip-toes
lecture attendance; auditing
(Goedel's) incompleteness theorem
point in common; common feature
point of view; viewpoint; angle; visual point (position of the eye in calculations of optical instruments)
lining; backing; backing up (e.g. a theory); support; bolstering
cutting edge; leading edge; forefront; tip; end
to catch sight of; to come into view; to happen to see
NEET (young person not in education, employment or training)
to complete decisively; to do to completion
learning; scholarship; study; study of ...; -ology; -ics
as one would expect; naturally; indeed; still; all the same; after all