(just) out of curiosity; (just) in order to satisfy one's curiosity; aimed chiefly at amusing; sensational (e.g. magazine)
what do you want?; can I help you?
impertinent; saucy; cheeky; impudent; audacious; cocky
losing a battle; lost battle; battle one cannot win; battle one is doomed to lose
wise man; philosopher; sage
unable to leave the work at hand; right in the middle of something; tied up; busy
key; lock; key (to a problem); clue
circle and cross; right and wrong (answers); true-false
not entirely wrong but not entirely right; so-so; average
circle; "correct"; "good"; *; _; period
racing (of an engine); spinning one's wheels; running idle; fruitless effort; going nowhere; going round in circles
to rise (steeply); to tower; to soar
(bearing a) close resemblance; vivid reminder (e.g. of the past); dim; faint; vague
medical science; medicine
somehow; for some reason; without knowing why
dissatisfaction; discontent; disapproval; objection; complaint; protest
specialization; specialisation; differentiation
universal; omnipresent; ubiquitous
leadership skill; leadership ability
to be full of (e.g. adventure, youth, energy); to be overflowing with
to use as an intermediary; to worry; to mind; to care
to bewilder; to perplex; to puzzle; to tempt; to seduce
construction; building; putting up; erecting; creation; formulation
for the present; for the time being
won't (hasn't, isn't, doesn't, etc.); won't you
pleasantry; joke; tomfoolery
sensible; perceptive; quick to understand; understanding; sympathetic
traveller's journal; traveler's journal; travelogue
nodding off (while sitting); dozing
to thrust away; to send flying
to miss one's footing; to be off the right track; to be on the wrong path
to strike against; to collide with; to encounter; to meet; to clash
artificiality; pretence; contrived act; commission (of a crime); feasance
release (e.g. information); disclosure (legal); show; indication; display
underpants; pants; briefs; trousers (esp. women's); jodhpurs; breeches
unrestrained; unreserved; candid; frank
exaggeration; overstatement; saying too much; misstatement; slip of the tongue; gaffe