foundation; base; basis; from the beginning; from the outset; by nature
recommendation; advice; suggestion; encouragement
to have a smattering knowledge of
classroom; lecture room; department (in a university); class; lessons; school (for a particular discipline)
lesson; class; teaching; instruction; classwork; schoolwork
to begin talking; to open up
characteristic (of); peculiar (to); inherent (in); eigen-
attenuation; damping; decay
thin; slender; fine; unlucky
(shooting up) one after another; (sprouting up) all over the place; (growing) rapidly
aptitude; aptness; suitability
quality; value; nature; inherent quality; logical quality
with a friendly grin; smilingly
reset; fresh start; new beginning
different (quality, nature); heterogeneous
careful thought; consideration; deliberation; reflection; rumination; pondering
basics; fundamentals; basis; basically; fundamentally
drying up; running dry; running out; being exhausted; being drained
high ground; plateau; heights; highlands
hypothesis; supposition; assumption; tentative theory
to become familiar with; to get used to; to become accustomed to; to come to fit; to go (well) with; to suit
hard-to-do; difficult; tough; awkward; tricky
to exchange (messages, greetings, arguments, etc.); to intersect; to cross; ... with one another; ... to each other
dropping out of school; withdrawal from school; expulsion from school; dismissal; leaving school (university, etc.) after completing a course
a long time (since the last time); first in a long time; it's been a long time; long time no see
unable to contain oneself; itching to do something; cannot sit still
very much; intensely; overwhelmingly; excessively; irresistibly; without any obvious reason
running fast; double time; cantering; doing things in a hurry
hurriedly; in a hurry; hastily; in haste