anapaest = struck back or rebounding, because it's a reversed dactyl

iamb = an iamb, sorry; neither Greek nor English dictionaries show any other root it might be derived from

spondee = suitable for solemn libations

trochee = running

I can never remember which is which of these, and always when I reread them grasp at the fact that 'spondee' is a spondee, and see if I can pin them down that way. Illusory.