VERBS

be

ADV

purely
These are purely defensive measures
essentially, largely
a largely defensive campaign

VERBS

be, feel, look, seem, sound
become, get
Whenever anyone mention women's rights, he gets rather defensive

ADV

extremely, fiercely, very
He did not once glance at his listeners and seemed fiercely defensive
a little, rather, slightly, somewhat
oddly
Her manner was oddly defensive, as he hadn't intended any criticism at all

PREP

about
He is extremely defensive about his work