パンツ

ぱんつ
noun
underwear; pants
clothing
See also: ズボン (trousers (older term))
1. underwear; underpants
Undergarments worn on the lower body.
パンツ(あら)
I wash my underwear/pants.
I bought new underwear/pants.
These pants are easy to wear.
2. pants; trousers
Outer garments covering the legs.
パンツ(あら)
I wash my underwear/pants.
I bought new underwear/pants.
These pants are easy to wear.

パンツ is a loanword from English 'pants' with two distinct meanings in Japanese.

Meaning 1 - underwear

When used alone, パンツ most commonly means underpants/underwear in everyday speech.

Meaning 2 - TROUSERS/PANTS

In fashion contexts, パンツ refers to outer garments (trousers).

Distinguishing terms

Usage

Context usually makes the meaning clear. Fashion magazines and stores use パンツ for trousers, while in daily conversation it typically means underwear.