American Standard Version
My heart fluttereth, horror hath affrighted me; the twilight that I desired hath been turned into trembling unto me.

Berean Study Bible
My heart falters; fear makes me tremble. The twilight of my desire has turned to horror.

Douay-Rheims Bible
My heart failed, darkness amazed me: Babylon my beloved is become a wonder to me.

English Revised Version
My heart panteth, horror hath affrighted me: the twilight that I desired hath been turned into trembling unto me.

King James Bible
My heart panted, fearfulness affrighted me: the night of my pleasure hath he turned into fear unto me.

World English Bible
My heart flutters. Horror has frightened me. The twilight that I desired has been turned into trembling for me.

Young's Literal Translation
Wandered hath my heart, trembling hath terrified me, The twilight of my desire He hath made a fear to me,

Isaiah 21:4 Additional Translations ...