reflection; reverberation; reflex; reflexes
care; looking after; repair; (police) raid; crackdown
glance; look; glimpse; complete view; bird's-eye view
to worry about (someone's welfare or comfort); to feel anxious about; to have apprehensions of
shyness; bashfulness; shame
extra; more; unnecessary; needless; all the more; even more
menial; meanness; servility; abject
to be greatly obliged; to be very sorry
elegant; graceful; refined; leisurely; comfortable; easy
anyway; by the way; incidentally; well; to change the subject
search; lookup; hunt; (item of) research; exploration; investigation
extravagant; absurd; unbelievable; enormous; tremendous; extraordinary
collection of books; (personal) library
several; a number of; quantity; amount; counting; figures; number
largest class; top category
indeed; really; truly; very much
to be stumped; to be at a loss; to be at one's wits' end; to be fed up; to be tired (of); to be unable to bear
to speak with restraint; to understate; to downplay; to put it mildly; to say the least
waste of time; killing time
explanation; commentary; exposition; elucidation
bulky; massive; thick; heavy
investigation; inspection; examination; tune; note; melody
to read and understand; to subject to close analysis; to read deeply; to decipher; to decode
giving something a try because it will not do any harm
pleasant; agreeable; comfortable; refreshing
appearance; (outward) looks; exterior appearance
to write down; to note; to jot down; to remember
to take lessons in; to be taught; to learn (from a teacher); to study (under a teacher); to get training in
basics; rudiments; elements; ABCs of ...
outsider's perspective; as seen by an observer
user; consumer; master (e.g. of swordsmanship); prodigal; spendthrift
departure; departing (from ...); sending; sent (by ...); engine; counter for gunshots, bursts of gas, etc.
principle; theory; fundamental truth
representative; representation; delegation; switchboard number; main number
way to use something; treatment; management (of help)
degree of difficulty; difficulty level