trào

• (Hà Nội) IPA^(key): [t͡ɕaːw˨˩]
• (Huế) IPA^(key): [ʈaːw˦˩]
• (Hồ Chí Minh City) IPA^(key): [ʈaːw˨˩]

From Middle Vietnamese blào.

Even if this word was not derived from Chinese 潮 (cháo) (SV: triều) (since it is not possible to expain the labial-lateral ‹bl-› cluster attested in Middle Vietnamese with 潮), trào almost certainly received significant semantic influence from the Sinitic word.

trào • (潮)

1. to overflow, to brim over
   • 2013, Ngọc Tài Trần, Thường Huệ Nguyên, Cốt tủy thực dưỡng, Công ty Văn hóa Hương Trang, page 145:

     Thêm muối và nấu nhừ trong 1 giờ (đậy hở nắp và đừng cho cháo trào).

     Add salt and let stew thoroughly for one hour (lid partially on and avoid the congee boiling over).

• tràn

Non-Sino-Vietnamese reading of Chinese 潮 (“tide”, SV: triều).

Might be considered Sino-Vietnamese proper and not just a non-Sino-Vietnamese reading.

trào

1. (only in compounds) tide