Job 18:3

Wherefore are we counted as beasts? - “Why are we treated in your remarks as if we had no sense, and were unworthy of sound argument in reply to what we say?” It is possible that there may be reference here to what Job said Job 12:7 - that even the beasts could give them information about God. But the general idea is, that Job had not treated their views with the attention which they deserved, but had regarded them as unworthy of notice.

And reputed vile - The word used here (טמה ṭâmâh) means to be unclean, or polluted; and the idea is, that Job regarded them as worthless or impious.