Synonyms for extremely slow

Synonyms for extremely

incredibly (exceedingly, fantastically, exceptionally >>)
highly (particularly, especially, intensely >>)
really (too, so, very much >>)
hugely (immensely, enormously, vitally >>)
terribly
most
greatly
severely (seriously, grossly, badly >>)
exclusively
wildly
exceeding

See all synonyms for extremely

Synonyms for slow

slow down (decelerate, retard, slacken >>)
sluggish (languid, tardy, dilatory >>)
gradual
leisurely
delay
hinder
moderate
slack

See all synonyms for slow