Japanese edit

For pronunciation and definitions of そくせき – see the following entries.
即席
[noun] being impromptu, extemporaneous, off the cuff
[noun] being instant (of a beverage or food)
足跡
[noun] a trace of someone's work
足蹠
[noun] sole (bottom of a shoe or boot)
(This term, そくせき, is the hiragana spelling of the above terms.)