For the first time, an edge of anger crept into the man's voice.

That disturbed edge to her senses was creeping back again.

A defensive edge crept into her voice, one she despised.

She hesitated, and an edge of concern crept into her voice.

More than a year later, a hard edge still creeps into his voice when he discusses the situation.

I tried to keep my voice light but a harsh edge crept in.

"Of course I did," she said, a slight edge creeping into her voice.

She didn't want sympathy, and a hard edge crept into her voice.

"Wait a minute," he said, an edge of excitement creeping into his voice.

His voice lowered and a hard edge crept into it.