infrared rays; infrared radiation
observation; survey; measurement; opinion; prediction; thinking
bowstring; string (of a shamisen, etc.); stringed instrument; chord; hypotenuse
to shake; to sway; to waver
resonance; sympathy (with a view, idea, etc.)
phantom; vision; illusion; extremely rare item
decision; settlement; definition
equals sign; equality sign
systematic; regular; routine
delineation; demarcation; drawing a line (e.g. between what's acceptable and unacceptable); (measuring) ruler
alright to do; can do; do not mind doing; gladly do; might as well do
environment; circumstance
applying (e.g. a technology); adoption
utmost limit; extremity; result
that is to say; so that means
significant; useful; meaningful; worthwhile; valuable; of interest
great; excellent; very troublesome; awful; tiring; tough
to be remembered; to go down in history
that much; as much; to that extent; only that; that alone; no more than that
a little; some; somewhat; amount; quantity; number
since when; from when; how long
descendant; posterity; offspring
meme (idea, etc. spreading from person to person within a culture); (Internet) meme
invalid; void; ineffective; unavailable
no matter for; without regard to; whatever the ...
scary; frightening; eerie; dreadful
to mask; to cover; to cloak; to hide; to conceal
fingertip; finger; toe tip; toe