(typography) the distribution of any plural number of lines and leads so that they fit a specific number of ems, for example, 2 or 3 lines within 4 ems

complex (not simple or straightforward)

extraordinary, unusual

emergency

very; extremely / exceedingly; tremendously

a line of text / (mathematics) a row of a matrix / (calligraphy) Abbreviation of 行書 (“semi-cursive script”).

dustpan

stairs used in emergencies

state of emergency (unusually difficult or dangerous situation)

to go / to carry out / line, row