HSK10+
hāi
an exclamation
Phonosemantic compound. 口 represents the meaning and 海 represents the sound.
口 Meaning component
kǒu
mouth
海 Sound component
hǎi
sea
嗨
an exclamation; oh alas; hey!; hi! (loanword); a high (natural or drug-induced) (loanword)
Make Me a Hanzi
Unicode
Dong Chinese
CC-CEDICT
SUBTLEX-CH
MTSU Chinese text computing
漢語多功能字庫