In various senses of loath, adj.: Harmfulness, enmity; unpleasantness. Obsolete.

†(a) The fact of being annoying, unpleasant, or repulsive; offensiveness. Obsolete. (b) A cause of annoyance or disgust; an offensive person…

The quality or condition of being noisome; unwholesomeness, offensiveness; an instance of this.

A cause of disgust; repulsiveness. rare.

The quality or state of being unpleasant; disagreeableness.

The quality of being displeasing or unpleasant, unpleasantness; also, the condition of being displeased, displeasure.

The quality or fact of being unlovely; unpleasantness, hatefulness; ugliness.

Unpleasantness, disagreeableness; troublesomeness; hurtfulness, noxiousness; badness. Obsolete.

Unwelcomeness.

The quality of being unpleasant or displeasing; disagreeableness.

The quality, character, or fact of being offensive; injuriousness, hurtfulness; unpleasantness, disgustingness.

Unpleasantness, disagreeableness.

The state or quality of being disagreeable; unpleasantness. Also: an unpleasant feature or thing.

The quality of being distasteful; unpleasantness to the taste or mind, offensiveness.

The quality of being like bees: used by Penn in his answer to the divines, who had termed the Friends ‘wasps’.

The quality or state of causing or involving discomfort.

Unpleasantness; disagreeableness. rare.

(un-, prefix1 affix 6.)

Unpleasantness, disagreeableness; (in a person) bad temper, viciousness. Also: an unpleasant or disagreeable thing, characteristic, event, etc.

The quality or condition of being unpleasant or disagreeable; unpleasantness. Formerly also: †an unpleasant act or experience (obsolete).

Something unpleasant; an unpleasant situation, experience, etc. Cf. unpleasantness, n. 1b.

The quality or state of being unpleasant; unpleasantness; (sometimes) spec. bad feeling, quarrelling.

figurative, with reference to the unpleasant or injurious qualities of grit.