chạp

Vietnamese Wikipedia has an article on:

Tháng chạp

Wikipedia ^vi

English Wikipedia has an article on:

the 12^th month of the lunar year

Wikipedia

Non-Sino-Vietnamese reading of Chinese 臘 (“the 12^th month of the lunar year”, SV: lạp).

The same development of the initial can also be seen with chàng & possibly also chuồng (if the latter were indeed an early Chinese loan according to Alves, 2018).

• (Hà Nội) IPA^(key): [t͡ɕaːp̚˧˨ʔ]
• (Huế) IPA^(key): [t͡ɕaːp̚˨˩ʔ]
• (Saigon) IPA^(key): [caːp̚˨˩˨]

chạp • (臘)

1. the 12^th month of the lunar year

• giêng