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
differentiation; differential; derivative
to overturn; to capsize; to overthrow (government etc.); to reverse (decision etc.); to disprove (an established theory etc.)
complex; complex (number)
three dimensions; three dimensional; 3D; 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
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
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
opinion; point of view; visual point
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
classroom learning (as contrasted to practical training); classroom lecture
to hear; to catch (the sound of something); to hear about (rumour, etc.); to overhear; to get used to hearing