1 shy

2 embarrassed

3 bashful

1 mimosa

2 sensitive plant (that closes its leaves when touched)

1 bashful

2 shy

3 shyness

4 modesty

1 to fly into a rage out of humiliation

2 to be ashamed into anger (idiom)

1 shy

2 timid

1 to fly into a rage out of humiliation

2 to be ashamed into anger (idiom)

1 tongue-tied for fear of embarrassment (idiom)

1 to be too embarrassed for words (idiom)

1 to feel ashamed (idiom)

1 to be too shy to speak one's mind (idiom)