The　realization　of　the　strong　coupling　regime　is　requisite　for　implementing　quantum　information　tasks.　Here,　a　method　for　enhancing　the　atom–field　coupling　in　highly　dissipative　coupled　cavities　is　proposed.　By　introducing　parametric　squeezing　into　the　primary　cavity,　which　is　only　virtually　excited　under　specific　parametric　conditions,　coupling　enhancement　between　the　atom　and　the　auxiliary　cavity　is　realized　for　appropriate　squeezing　parameters.　This　enables　the　system　to　be　robust　against　large　cavity　decay　and　atomic　spontaneous　emission.　The　observation　of　vacuum　Rabi　oscillations　show　that　the　originally　weakly　coupled　system　can　be　enhanced　into　an　effective　strong　coupling regime.　©　2019　WILEY-VCH　Verlag　GmbH　&　Co.　KGaA,　Weinheim