The voice of penance and of grief came slow, embellished, tremulous.
With circumspection, as invariably when entering an abode (his own or not his own): with solicitude, the snakespiral springs of the mattress being old, the brass quoits and pendent viper radii loose and tremulous under stress and strain: prudently, as entering a lair or ambush of lust or adders: lightly, the less to disturb: reverently, the bed of conception and of birth, of consummation of marriage and of breach of marriage, of sleep and of death.
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She spoke timidly in a tremulous voice.
She tried to sound confident, but her voice was tremulous.