摒

Because both "摒" and "屏" have the meaning of "elimination", "摒除" "摒弃" is synonymous with "屏 (bǐng)除" and "屏 (bǐng) 弃"; but because "摒" has no meaning of "inhibition", Therefore, "屏声" and "屏息" cannot be written as "摒声" or "摒声".