With hesitation, not actively or energetically, coldly, half-heartedly. Obsolete.

Without much interest, insistence, or heartiness; indifferently.

with half a heart: with divided affection or enthusiasm; without full commitment; half-heartedly.

Without enthusiasm or commitment; dejectedly, half-heartedly, listlessly. Now rare.

In a lukewarm manner.

In a manner characterized by lack of affection, enthusiasm, or interest. Cf. disaffection, n. 1.

in a tepid or lukewarm manner.