わんわん

わんわん is an onomatopoeia for a dog's bark and also baby talk for 'dog/doggie.'

AS ONOMATOPOEIA (sound):

• 犬(いぬ)がわんわん吠(ほ)える: the dog barks 'woof woof'
• わんわん泣(な)く: to cry loudly (like a child wailing)

AS BABY TALK (noun):

• わんわんがいる!: There's a doggie!
• わんわん、おいで: Come here, doggie!

Other animal sounds

• にゃんにゃん/にゃー: cat (meow)
• もうもう: cow (moo)
• ぴよぴよ: chick (chirp)
• コケコッコー: rooster (cock-a-doodle-doo)
• ケロケロ: frog (ribbit)

Child language

Many animal sounds become nouns in baby talk:

• わんわん = 犬(いぬ) (dog)
• にゃんにゃん = 猫(ねこ) (cat)
• もうもう = 牛(うし) (cow)