An Etymological Dictionary of the German Language/tunken
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tunken, vb., ‘to dip, steep, soak,’ from MidHG. tunken, dunken, OHG. tunchôn, dunchôn, wk. vb., ‘to immerse.’ The OHG. variant thunkôn leads to a Goth. *þugkôn, which must be allied to Lat. tingere, ‘to moisten, dip,’ and to Gr. τέγγω, ‘to soften, moisten.’ Hence tunken cannot be connected with tauchen.