underscore-v; 1 Senses

Sense Number 1: emphasize; draw attention to; underline

Now, it may be argued that it is the writer's intention to underscore the phrase.
I share the same concerns and I wish to underscore the phrase 'abiding commitment'.
Risk of orca extinction was underscored in analysis.
'Dire situation' underscored by rising costs.

PropBank: underscore.01
WordNet 3.0 Sense Numbers: 1, 2