Alter Aeon Online Help

Keywords are:  'debuff webbed webbing'

Certain creatures, monstrous spiders in particular, can expel sticky
webbing in combat. While not a debilitating hindrance, the webs have
a slight impact on dexterity. Webbed creatures also have a chance of
tripping and falling when they try to flee. 

The webs do not last long. Damaging protective spells such as fire
shield, ice shield and thorn armor will destroy them before they have
a chance to stick. Catching on fire will burn up webs. In addition,
the warrior skill 'indomitable will' easily removes webbing. High
strength will help you resist being webbed.