So as to fail to meet an expected standard; poorly, insufficiently, inadequately; imperfectly, defectively, not properly.

Too little, insufficiently. Now rare.

In an insufficient manner or degree; inadequately; not enough.

In a deficient manner; defectively, insufficiently.

In an incompetent manner or degree; inadequately, insufficiently; with incompetence.

In special collocations. none too‥is used by meiosis for ‘not quite‥enough’, ‘somewhat insufficiently’; also rather less than; only moderately; not…