lián​tǐ

conjoined

连体 (連體) lián​tǐ
conjoined noun
physically linked or fused together, typically referring to twins

The conjoined twins underwent a successful separation surgery after birth.

one-piece adjective
consisting of a single piece of clothing rather than separate top and bottom

She wore a blue one-piece swimsuit to the beach.

Frequency

Movie subtitles
2.24 per million appears in 1% of films
Written text
2.01 per million

Sources

Definitions
CC-CEDICT