Langimage
English

sheath

|sheath|

B2

/ʃiːθ/

protective cover

Etymology
Etymology Information

'sheath' originates from Old English, specifically the word 'sceaðu' (or 'scēaðu'), where the root meant 'covering' or 'case'.

Historical Evolution

'sheath' changed from Old English 'sceaðu' through Middle English forms such as 'schethe' and 'shethe' and eventually became the modern English word 'sheath'.

Meaning Changes

Initially it meant 'a covering or case' (particularly for blades); over time this core meaning remained but extended metaphorically to botanical and anatomical coverings.

Meanings by Part of Speech

Noun 1

a protective close-fitting cover for the blade of a knife, sword, or similar instrument; a scabbard or case.

He slid the sword back into its sheath.

Synonyms

Noun 2

a protective or enclosing structure in plants (e.g., a leaf sheath) that wraps around a stem or leaf base.

The grass blade emerged from its sheath.

Synonyms

leaf sheathbract (in some contexts)

Noun 3

an anatomical covering or layer surrounding an organ or structure (e.g., the myelin sheath around nerve fibers).

Damage to the myelin sheath can affect nerve signaling.

Synonyms

Verb 1

to put (a blade or weapon) into a sheath; to place in a scabbard.

She sheathed the knife after cutting the rope.

Synonyms

Antonyms

Verb 2

to cover or envelop (something) as if with a sheath; to encase or cloak.

Mist sheathed the valley in the early morning.

Synonyms

Last updated: 2025/08/16 18:56