means To make the sharp hissing, crackling sound of food frying or something burning in intense heat; figuratively, to crackle with energy, heat, or excitement.

from An echoic word — it imitates the very sound it names, like 'hiss' and 'fizz' before it. It appears in English around the 17th century, likely a frequentative form of the older 'siss' (a hiss), with that trailing '-le' suffix that English loves to tack on for repeated, continuous sounds — the same one that turns 'crack' into 'crackle' and 'spark' into 'sparkle.' In other words, the word is built to keep sizzling.