lightning; flash of lightning; lightning bolt
transient (symptom, phenomenon); temporary; passing; fleeting
spectrum (radio, etc.); spectral; spectra
depiction; description; portrayal
to beat fast (of one's heart); to flutter (with joy, anticipation, etc.); to throb; to pound; to palpitate
to erase all trace of something
at all costs; at any cost; surmounting all difficulties
tackle (e.g. rugby); fishing tackle
to force someone to clamp with their teeth; to force into someone's mouth (e.g. a gag); to wedge into a space; to inflict (a blow); to deal (a hit); to pull (a joke)
having to be; must be; should be; ought to be
the very end; finish; to the very end; to the last; thoroughly
hoping against hope; desperately hoping; as a last hope
memorization; memorisation; learning by heart
(common) cold; influenza; flu; ague; inflammatory respiratory system illness (in general)
one example of (when there are more examples)
(police) detective; criminal matter
pathogenic bacteria; germ; pathogen
rough estimate; sloppy accounting; slapdash bookkeeping
retribution; retributive justice; karma; just deserts; poetic justice; reward and punishment for one's past behavior
one's weak point; one's sore spot; raw nerve
lie; fib; mistake; error; unwise move; bad decision
the person concerned; the person in question; the said person
secret (recipe, medicine, etc.); mysteries (e.g. of an art)
selling on the market (in the marketplace, in stores, etc.); making something commercially available; commercial (e.g. software); over-the-counter; off-the-shelf
improvisation; improvised; impromptu; extempore
experiments using animals; in-vivo testing; animal testing
affected part; diseased part; wound
slim; slender; slight; delicate
to publish a book; to put out a book
composite; combined; complex
spirit; soul; drive; vigor; vigour
to cheat (in a romantic relationship); to play it both ways; to sit on the fence; to two-time
seeing two people (i.e. romantically) at the same time; two-timing; bifurcation; fork; fence-sitting; playing it both ways
perplexity; difficult question; difficult problem