Scrape off as much as possible with a blunt knife.
'blunt' In British English, if a knife is no longer sharp, you do not say that it is 'dull'.
Synonyms: dull, colorless, drab 1, humdrum, lackluster, pedestrian, stodgy, uninspired These adjectives mean lacking in liveliness, charm, or surprise: a dull, uninteresting performance; a colorless and unimaginative person; a drab and boring job; a humdrum conversation; a lackluster life; a pedestrian movie plot; a stodgy dinner party; an uninspired lecture.
It will be so dull here without you.cookn
Not clear or resonant: a dull thud.
I thought the book dull and unoriginal.
Lacking in perception or the ability to respond; insensitive 4.
(Medicine) med (of sound elicited by percussion, esp of the chest) not resonant vb 12.
He had a cut on his face from shaving with a dull razor.
Arousing little interest; lacking liveliness; boring: a dull movie.
Not intensely or keenly felt: a dull ache.
Not brisk or rapid; sluggish: Business has been dull.
(Colours) (of colour) lacking brilliance or brightness; sombre 10.
To make or become dull Old English dol; related to Old Norse dul conceit, Old High German tol foolish, Greek tholeros confused dullish adj dullness dulness n dully adv dull (dl) adj., duller, dullest, v.
Not intense or acute: a dull pain.
Old Saxon dol, Old High German tol dullish, adj.
Slow to think or understand; stupid 2.
'dull' If you say that something is dull, you mean that it is not interesting.
(Physical Geography) (of weather) not bright or clear; cloudy 7.
Not bright, intense, or clear; dim: a dull day; a dull sound.
American download English also uses dull for this meaning.