ineffable

US /ˌɪnˈef.ə.bəl/
UK /ˌɪnˈef.ə.bəl/
"ineffable" picture
1.

難以言喻的, 不可言說的

too great or extreme to be expressed or described in words

:
The beauty of the sunset was ineffable.
日落的美麗是難以言喻的
He felt an ineffable joy upon seeing his newborn child.
看到他剛出生的孩子,他感到一種難以言喻的喜悅。