All 8 Uses of
heed
in
Faust -- Part 1 -- translated by Theil
-   Take heed,
 The import of this primal sentence weigh,
 Lest thy too hasty pen be led astray!†*heed = pay close attention to; or do what is suggested
-   Like a fox in iron snare,
 Hell's old lynx is quaking there,
 But take heed!†
-   MEPHISTOPHELES
 You are upon the proper track, I find;
 Take heed, let nothing dissipate your mind.†
-   BRANDER
 Take proper heed, the tailor strictly charge,
 The nicest measurement to take,
 And as he loves his head, to make
 The hose quite smooth and not too large!†
-   Virtue she hath, and modest heed,
 Is piquant too, and sharp withal.†
- Maiden take heed!†
- To my last words give heed!†
-   Laws are unheeded by the devil's host;
 Wise as we are, yet Tegel hath its ghost!†unheeded = ignoredstandard prefix: The prefix "un-" in unheeded means not and reverses the meaning of heeded. This is the same pattern you see in words like unhappy, unknown, and unlucky.
Definition:
pay close attention to; or to do what is suggested -- especially with regard to a warning or other advice