trace; vestige; mark; sign; evidence
clue; lead; key; handhold; hold
dangerous weapon; lethal weapon; deadly weapon; murder weapon
unclear; obscure; unknown; unidentified; ignorance; lack of wisdom
means; way; method; measure
witnessing; observing; sighting
possibility; chance; potential; potentiality; possibility (modal property of a proposition containing no logical contradiction)
testimony; (verbal) evidence
a few hours; several hours; a couple of hours
sedative; tranquilizer; tranquiliser
obstinate; stubborn; mulish; die-hard; bigoted
refusal; rejection; denial; veto
only; merely; approximately; about; just (finished, etc.); as if to; (as though) about to
natural; understandable; reasonable; no wonder
to talk about; to speak of; to recite; to chant; to indicate; to show
to some extent; to a certain extent
authenticity; credibility
to doubt; to distrust; to be suspicious of; to suspect
firm; strong; unbending; unyielding; uncompromising; stubborn
-ical; -ive; -like; -ish; (something) like; along the lines of
is not ... either; is (neither ...) nor ...; nor is it ...; does not ... either; (neither ...) nor ...; does not even ...
limit; limits; degree; extent; the end; the last; as long as ...
excluding; except (for); apart from; outside (a boundary, scope, etc.)
no more than; just; only; mere; goes no further than
to mind; to care about; to be an issue; to matter; to keep company; to care for; to interfere with
surplus; margin; leeway; composure; placidity; complacency
question (e.g. on a test); problem; problem (e.g. societal, political); question; question (i.e. doubt); public discussion
moving forward (e.g. of a vehicle); onward movement; progress (of work, activities, etc.); advance; progression (of a disease, global warming, etc.); progression (e.g. chord progression)
all of a sudden; suddenly; by chance; unexpectedly
seeming ...; appearing ...; -ish; like a ...; typical of ...
to hear a rumor; to get wind of
to run to; to come running; to rush (someplace); to hasten
curious onlookers; rubbernecks
to be mixed; to be blended with; to be combined; to associate with; to mingle with; to interest
to be surprised; to be taken aback; to be amazed; to be frightened; to be startled; to be alarmed
to take (someone to a place); to take (someone) with one; to take along; to lead away
cross-examination; close questioning; demanding an explanation
missing (of a person); lost; unaccounted for; whereabouts unknown
to memorize; to memorise; to commit to memory; to learn by heart; to bear in mind; to remember
becoming clear; coming to light; being ascertained; being identified; being confirmed
how; in what way; why; for what reason; cannot possibly; no way
to break off; to come to an end; to be interrupted; to be cut short; to pause
that is to say; that is; in short; in brief; clogging; obstruction; shrinkage
center; centre; middle; -centered; -centred; -focused
to regard (as); to recognize (as); to see as; to pay attention to; to watch
to hold (in one's hand); to take; to possess; to have; to maintain; to keep; to last
to send (someone) back; to send (someone) home