densest

Least spread out

Densest is the superlative of dense—the most tightly packed or concentrated: the densest forest I've ever seen, the densest part of the city.

When dense means slow-witted, densest becomes an insult: He's the densest person in the room.

In physics, it describes maximum mass per unit volume: Lead is among the densest common metals.

impenetrable

opaque

Impassable to light

impassable · thick · obscure · murky · foggy · jungle · undergrowth · thicket · tangled · matted

packed

crowded

Filled beyond comfort

concentrated · jammed · crammed · squeezed · teeming · swarming · packed · cramped · saturated · consolidated

heavy

weighty

Heavy or significant

  • massiveExtremely large and heavy
  • heftyConsiderable in weight
  • leadenOppressively heavy or dull

solid · substantial · gravitational · ponderous · lumbering · cumbersome · bulky · compact · black-hole · osmium

thick

viscous

Thick and slow-flowing

pasty · sludgy · clotted · gummy · sticky · concentrated · reduced · treacly · molasses · custard

intense

concentrated

Gathered or intensified

strong · powerful · profound · complex · layered · nuanced · overwhelming · vivid · deep · extreme

Opposites
physical density/compactness

densestlightest

Minimum in heaviness

thinnest · sparsest · clearest · airiest · fluffiest

cognitive density/intelligence

densestsharpest

Having the finest edge

brightest · smartest · quickest · cleverest · keenest

Phrases
Family

dense, condense, condensed, denser, denseness, condenser

Familiarity
Top 100,000
Profile
Known to kids · Used worldwide · Timeless · Everyday, not technical · Rated G