Coming soonComplete SAT prep and GRE Math are on the way.

Viscous

mediumNeutral tone

VIS-kus

adjective

Definition

having a thick, sticky consistency; resistant to flow

Memory hook

VISCOUS sounds like VISCOSE/sticky goo: picture honey so thick it crawls like a slow snail.

See more GRE words with mnemonics.

Word roots

viscumbirdlime, sticky substance(Latin)

Learning roots unlocks whole word families. Study common GRE root words.

Examples

The viscous tar oozed slowly across the cracked pavement.
As the syrup cooled, it grew so viscous it barely poured.

Test yourself

Fill in the blank with the right word:

The ______ tar oozed slowly across the cracked pavement.
Show answer

viscous

Synonyms

thickglueysyrupygummy

Antonyms

runnythinfluidwatery

Categories

View all Science words

GRE Tip

Viscous is a medium-difficulty GRE word. On the GRE, you might see it paired with synonyms like "thick" or "gluey" in Sentence Equivalence questions. Look for contrast clues (however, despite, although) that signal the opposite meaning. Words like "runny".

Read: How to Memorize GRE Words That Actually Stick

Related GRE Words

Master viscous and 1,000+ GRE words

Learn through stories, practice with real GRE questions, and never forget with spaced repetition.