slippery

adjective

slip·​pery ˈsli-p(ə-)rē 

slipperier; slipperiest

1

a

: causing or tending to cause something to slide or fall

slippery roads

b

: tending to slip from the grasp

a slippery fish

2

a

: not firmly fixed : unstable

b

: not precise or fixed in meaning : ambiguous, elusive

3

: not to be trusted : tricky

slipperiness noun

Synonyms of slippery

• shady

Examples of slippery in a Sentence

The trails were muddy and slippery.

Fish are slippery to hold.

The sign cautions: “Slippery when wet.”

Recent Examples on the Web

We are thrown into the story without preamble, after a government shadow agency called WARDEX, headed by Firth’s Noah Scanlon, has kidnapped Jane Blankenship (Eve Hewson) as a means of getting to her slippery boyfriend Daniel Kellner (O’Connor). —David Rooney, HollywoodReporter, 9 June 2026

They are joined by Milo (Yeukayi Ushe), whose slippery jelly Tama escapes his control; Ameline (Evanna Lynch), Ssyelle’s mousy, enigmatic roommate; and Milo’s too-cool brother Odward (Waylon Jacobs). —Allison McClain Merrill, Parents, 8 June 2026

That additional maneuverability could prove useful when navigating the narrow, irregular, and often slippery environments found inside the human body. —New Atlas, 8 June 2026

Whether your summer travels involve hiking trails, exploring rocky shorelines, or navigating slippery docks, Sharkey said these Keen sport sandals are up to the task. —Alexandra Emanuelli, Southern Living, 5 June 2026

Word History

Etymology

slipper entry 1 + -y entry 1

Note: As the earliest occurrence of slippery appears to be in the Coverdale Bible (1535, Psalm 35:6), it has been suggested that the addition of the suffix -y to the adjective slipper copies German schlipfferig in Luther's translation of the same passage (1534, present-day German schlüpfrig). The German word is ultimately from the same Germanic base as slip entry 5 (see Oxford Dictionary of English Etymology).

First Known Use

circa 1500, in the meaning defined at sense 1a

Phrases Containing slippery

• slippery elm
• slippery slope

Kids Definition

slippery

adjective

slip·​pery ˈslip-(ə-)rē 

slipperier; slipperiest

1

: having a surface smooth enough to cause one to slide or lose one's hold

2

: not worthy of trust : tricky, crafty

slipperiness noun