HSK 5
喂
wèi动
hey; to feed (an animal, baby, invalid etc); to feed
喂，请问王老师在吗？
Wèi, qǐng wèn wáng lǎo shī zài ma?
Hello, may I speak to Teacher Wang?
Say it
Hold the button, say it, then let go.
Other HSK words sharing a character
Also free:
New in the HSK 3.0 word list at level 5.