progress; being under way
middle of the night; dead of night
pictorial book; picture book; illustrated reference book; identification manual; field guide
coloring; colouring; color scheme; colour scheme; (touch of) colour; embellishment
abundant; plentiful; rich; wealthy; open (mind); relaxed
illustration; picture; sketch; drawing; figure
to dedicate; to make an offering; to supply; to store; to finish; to bring to a close; to restore (something to its place)
wearisome; insipid; dull; irksome; wretched; vain
having said that; on the other hand
explanation; commentary; exposition; elucidation
sentence; composition; text; the literary arts (as opposed to the military arts); academia; statement
bundle; package; parcel; counter for wrapped objects
folding chair (with tubular metal frame)
(formal) shirt; dress shirt; business shirt; button-up shirt
on paper; in the newspapers; in a letter
interval; break; pause; spare moment
powder snow; powdery snow
study; scholarship; learning; discipline; branch of learning; (a) science
to take hold of; to possess; to haunt
research; investigation; enquiry; inquiry; study
to be absorbed in; to devote oneself (to); to give oneself over (to)
to stake; to risk; to bet; to wager
century; era; of the century (e.g. fight of the century)
perplexity; difficult question; difficult problem
to grapple with; to wrestle with; to engage in a bout; to tackle (e.g. a problem); to come to grips with; to work hard on
to explain; to dispel doubts
key; lock; key (to a problem); clue
expectation; anticipation; prediction; forecast; conjecture
from the standpoint of; as a matter of (e.g. fact); aboard (a ship or vehicle); on top of; first volume (e.g. book); superior quality; best
distance across; diameter
string; cord; man who is financially dependent on a woman; gigolo; restrictions; conditions
proof; testimony; demonstration; verification; certification
rough (estimate, manner, etc.); crude; broad; loose; careless (work)
riddle; puzzle; enigma; enigmatic; mysterious
conclusion; decision; end; settlement
late autumn (fall); (arch.) ninth month of the lunar calendar
to become clear (water, air, etc.); to become transparent; to resonate clearly (e.g. voice); to become serene; to become tranquil; to pronounce as an unvoiced sound