"stiffer" in the adjective sense
1. stiff
not moving or operating freely
"a stiff hinge"
2. stiff
powerful
"a stiff current"
"a stiff breeze"
3. starchy, stiff, buckram
rigidly formal
"a starchy manner"
"the letter was stiff and formal"
"his prose has a buckram quality"
4. potent, strong, stiff
having a strong physiological or chemical effect
"a potent toxin"
"potent liquor"
"a potent cup of tea"
"a stiff drink"
5. firm, steadfast, steady, stiff, unbendable, unfaltering, unshakable, unwavering
marked by firm determination or resolution not shakable
"firm convictions"
"a firm mouth"
"steadfast resolve"
"a man of unbendable perseverence"
"unwavering loyalty"
6. rigid, stiff
incapable of or resistant to bending
"a rigid strip of metal"
"a table made of rigid plastic"
"a palace guardsman stiff as a poker"
"stiff hair"
"a stiff neck"
7. besotted, blind drunk, blotto, crocked, cockeyed, fuddled, loaded, pie-eyed, pissed, pixilated, plastered, slopped, sloshed, smashed, soaked, soused, sozzled, squiffy, stiff, tight, wet
very drunk
Source: WordNet® (An amazing lexical database of English)
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