Browless, for faces with no eyebrows, the eyebrowless look.

Z-image does not understand no eyebrows or browless.

The model will fight with you - eyebrows are 'normal'. Including 'attractive' or 'pretty' in your description is likely to override the Lora and give eyebrows. You really need a strength over 1 and tweak the CFG up a bit, too. It does work.