helmet; hard hat; protective headgear
(around the) neck; nape; collar (at the front)
to conceal; to keep secret; to cover up
processing; dealing with; treatment; disposition; disposal
to look through; to hold up to the light; to make an opening; to leave space; to fart without making a sound
one place; (all in) the same place; one spot; one location; one part; one passage
skin; body (in the context of intimate bodily contact); surface; grain (e.g. of wood); disposition; temperament
exposure; laying bare; baring (e.g. skin); (photographic) exposure
whole (body); full-length (e.g. portrait); systemic
black; black go stone; guilt; guilty person
one color; one colour; one article; same tendency; everyone being caught up in the same thing
black; dark; blackish; suspicious; criminal; darkened and dirty; sooty
mask; veil; disguise; anonymous; unmarked; incognito
mass communication; mass media
accepted; fully-fledged; clear; respectable
official; formal; formula (e.g. mathematical); official (social media) account (of a company, organization, etc.)
report (of news); reporting; news; information; (media) coverage
following (a precedent, former policy, etc.); continuing with; sticking to; observing
activity (of a person, organization, animal, volcano, etc.); action; movie (esp. during the silent movie period)
confirmation; verification; validation; review; check; affirmation
robber; mugger; robbery; burglary
the rest; the others; in addition (to that); besides that; and so forth; and the like
systematic; organized; organizational
and; moreover; besides; as well as; and on top of that; at the same time
appearing in unexpected places and at unexpected moments; elusive; phantom
minute; detailed; careful; scrupulous; thorough
plan; project; schedule; scheme; program; programme
under (guidance, supervision, rules, the law, etc.); under (a flag, the sun, etc.); beneath; with (e.g. one blow); on (the promise, condition, assumption, etc. that ...); (somebody's) side
organization; organisation; structure; construction; system (e.g. railroad, transport, party, etc.); tissue; texture (of a rock)
gap; space; break; interlude; chink (in one's armor, armour); chance
sudden; abrupt; unexpected; unforeseen
purpose; goal; aim; objective; intention
darkness; the dark; bewilderment; despair; hidden place; secrecy
to disappear; to vanish; to go out (of a fire, light, etc.); to die; to fade (of a feeling, impression, etc.); to vanish (e.g. of hope); to go away (e.g. of a smell, itchiness, sleepiness)
to leave (behind); to leave (undone); to not finish; to save; to set aside; to leave (to someone, esp. after one's death)
Metropolitan Police Department (esp. Tokyo)
wide area; wide view (of a digitally displayed map); zoomed-out view
event; affair; incident; case; plot; trouble