Roleset undermine.01 Verbnet Class: NONE "weaken, not quantifiable":

Roles:

Arg0:causal agent


Arg1:thing weakening

Examples:

person: ns tense: present aspect: ns voice: active form: full


active (-)
The index was under pressure for most of the morning over concerns that the effects of Tuesday night's major earthquake in the San Francisco area would undermine the U.S. market.
Arg0:	the effects of Tuesday night's major earthquake in the San Francisco area
ArgM-MOD:	would
REL:	undermine
Arg1:	the U.S. market

person: ns tense: present aspect: ns voice: passive form: participle


passive (-)
He argues that efforts to firm up prices will be undermined *trace* by producers' plans to expand production capacity.
ArgM-MOD:	will
REL:	undermined
Arg1:	*trace* -> efforts to firm up prices
Arg0-by:	producers' plans to expand production capacity

"Not quantifiable" means that undermine cannot take EXT, start or end point arguments, unlike weaken.