suf ‧ fuse /səˈfjuːz/ BrE AmE verb [transitive] literary
[ Date: 1500-1600 ; Language: Latin ; Origin: past participle of suffundere 'to pour beneath, suffuse' , from sub- ( ⇨ ↑ sub- ) + fundere 'to pour' ]
1 . if warmth, colour, liquid etc suffuses something or someone, it covers or spreads through them:
The light of the setting sun suffused the clouds.
Hot colour suffused her cheeks.
2 . be suffused with something if someone is suffused with a feeling, they are full of that feeling:
She was suffused with happiness.