heavy / (of computers or programs) sluggish; slow / (of computer networks) congested; having poor performance

a division / something that divides two objects

the number of overlaps; fold, layer

main, principal, important

heavy, weighty / involving large-scale manufacture, heavy / great in degree, heavy, serious, severe, hard, difficult

weight

(Classical Japanese, archaic) to pile, add layers, stack, heap / (Classical Japanese, archaic) to repeat

heavy; important

relying heavily on

to rely heavily on