<span class="searchmatch">diffusissime</span> feminine plural of diffusissimo <span class="searchmatch">diffūsissimē</span> superlative degree of diffūsē...
diffusissimo (feminine diffusissima, masculine plural diffusissimi, feminine plural <span class="searchmatch">diffusissime</span>) superlative degree of diffuso (“very widespread or common”)...
diffūsus (“scattered, spread”). diffūsē (comparative diffūsius, superlative <span class="searchmatch">diffūsissimē</span>) diffusely, in a scattered manner. copiously, fully diffūsus “diffuse”...