An old word for ‘barring’ or ‘short of’ or ‘save’, used in George Herbert’s poem ‘Holy Baptism (II)’:

‘Let me be soft and supple to thy will, / Small to my self, to others mild, / Behither ill.’

Source: Quoted in John Drury, Music at Midnight: The Life and Poetry of George Herbert (London: Penguin Books, 2014), p. 51