Gather comes from Old English gaderian meaning 'to collect or unite', from Proto-Germanic *gadą meaning 'together'. The word together is its sibling — literally 'to-gather', a hidden tautology.
To come together or bring together in one place; to collect or harvest; to infer or understand.
From Old English gaderian, gæderian meaning 'to gather, to collect, to unite', from Proto-Germanic *gadurōną meaning 'to bring together', from *gadą meaning 'together, companionship'. The Proto-Germanic *gadą also produced the word together (Old English tōgædere, literally 'to-together') and good — though the connection to good is debated. The sense of 'to infer' developed in the 16th century: to gather information meant to collect facts, and from there it came to mean drawing a conclusion