难以形容的

The unspeakable odour clung to the room.

一股难以形容的气味充斥着房间散不出去。

The beauty of a sunset is ineffable.

日落的美是难以形容的。

It did not exactly beggar description, but it certainly had word on the lookout for the mendicancy squad.

虽然不能说绝对的难以形容际上，确与贫民窟也相差无几了。