(physics) soliton

(physics) travelling wave (wave that is not bounded by a given space, but can propagate freely)

to keep up; to retain / to maintain

point (at, to) / indicate; specify; point out / (shogi, chess) play (the game or a move); move (a piece); make (a move)

physics (as an area of study)

part, portion / copy of a newspaper or book

something that is set one way and will not change; something that is fixed; something that is regular

fixed, settled, certain

nearly the same, almost equal / break-even, neither profitable nor costly

(grammar) present progressive form / (by extension, with で) making progress