safe; secure; certainly; surely; no thanks; I'm good
instead; but (on the other hand)
to breathe out; to breathe; to tell (a lie); to use (foul language); to vomit; to throw up
teacher; instructor; sensei; title or form of address for a teacher, master, doctor, lawyer, etc.; intimate or teasing form of address; (arch.) one's elder
course (e.g. of lectures); academic university unit (professor, lecturers, etc.)
today; this day; these days; recently; nowadays
explanation; exposition; description; account; caption; legend
opening (in a game of go, chess, etc.); early stages; initial phase; outset
to be able (to); to be possible (to)
rudeness; impoliteness; discourtesy; insolence
condition; term; requirement; qualification; prerequisite
infinity; infinitude; eternity; infinite; limitless
to have (a) potential for ...; to have it in one to do
oh!; good heavens!; ugh!; oh no!; ah!; the penny drops!