right angle; perpendicular
classification; color coding; colour coding; color keying; colour keying; differentiation using different colors (colours)
to adjoin each other; to sit side by side
combination; assortment; matching (in a contest); pairing; combination
to come to a dead end; to come to a standstill; to reach a deadlock; to reach an impasse; to reach a stalemate
degree of difficulty; difficulty level
several; a number of; quantity; amount; counting; figures; number
unpleasant; disagreeable; nasty; lewd; lascivious; obscene
to have the memory of having done something oneself
sad; miserable; unhappy; sad; lamentable; deplorable
to be too much for one; to find unmanageable; to be beyond one's control; to not know what to do with
pessimism; disappointment
to build up; to complete; to construct; to make up; to fabricate; to invent
firm; unshakeable; resolute
hoop (of a barrel, bucket, etc.)
middle; centre; center; midpoint; heart
to cite as an example; to refer to; to quote
to manufacture; to produce; to raise (crops); to invent; to dream up; to create
to strengthen; to emphasize; to emphasise
to press against; to push against; to force against; to foist on (task, responsibility); to impose (one's will)
ardent; passionate; vehement
nice; good; well-executed
buzz; hum; shake (with vigor); shaking
erratic; offbeat; wild; extraordinary
preparedness; readiness; mental attitude; frame of mind
stability; steadiness; equilibrium
throughput; processing power
to be inferior to; to be less good at; to fall behind
superficial; apparent; seeming; surface; cosmetic
to give meaning (to); to assess the significance (of)
going backward; turning back; backtracking; retrogression; relapse; returning to a bad state
grace (of God); benevolence (of Buddha); assistance; help; effects; influence
counting backwards; calculating backwards; inverse operation; reverse operation
high tension (as in electronics, etc.); excited; enthusiastic
(emotional) tension; anxiety; (highness of) spirits; (good) mood; tension; tensile strength