going to bed; retiring (for the night)
staying up late; sitting up late at night; keeping late hours
to miss a chance to ask; to miss an opportunity to ask; to forget to ask
bosom (buddy); trusted (friend)
catching a cold; person with a cold
imprudent; indiscreet; immodest; indecent; inconsiderate; inappropriate
pleasant sound; pleasing sound; crack (of a baseball bat); (pleasant) roar (of an engine)
to dust; to remove dust; to slap; to hit (with the palm); to use up money
overcrowding; congestion; overpopulation; crammed (schedule); congested; busy
to bring to a finish; to bind firmly; to superintend
meat eating; eating of meat; meat diet; carnivorous
to go upstream; to go up (a river); to go back (to the past or origin); to date back (to); to trace back (to)
extinction; extermination; eradication; stamping out; wiping out
evolutionary theory; theory of evolution
chillingly; shiveringly; with goosebumps; uncomfortably; restlessly
one line; one streak; one item (in an itemized form); one clause; one matter (affair, event, case, incident)
practical question; practical problem; practical matter
to get; to obtain; to come by; to find
vigorous; cheerful; assertive
(arch.) fish; counter for fish
to give and take; to make mutual concessions; to compromise
parallel lines; remaining far apart (e.g. in discussions); not reaching an agreement; views that never cross
to take care doing something; to be prudent; to take no chances; to play it safe
perspiration given off during sleep; sweating while sleeping; night sweats
to go to bed; to go to sleep; to fall asleep; to be laid up (with a cold); to be ill in bed
unwell; in a bad state; not working properly; out of order; inconvenient; troublesome
checking (someone's) vital signs
vast; boundless; vague; obscure