Similar words: deepen, go off the deep end, opening, ripening, happening, dampening, eye-opening, peninsula. Meaning: ['diːpən] 
n. a process of becoming deeper and more profound. adj. accumulating and becoming more intense.
n. a process of becoming deeper and more profound. adj. accumulating and becoming more intense. 
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181) Dusk was deepening as they drove back to the lights of Shillingham.
182) The complementarity of their mutual trade is decreasing , but deepening on intra - industry trade.
183) In order to improve the performances of sensing devices, the approach of enlarging and deepening the pitch point aperture of resonant beam has been utilized.
More similar words: deepen, go off the deep end, opening, ripening, happening, dampening, eye-opening, peninsula, peninsular, sinai peninsula, depending, yucatan peninsula, arabian peninsula, depending on, evening, greening, wakening, widening, meninges, ravening, softening, chastening, darkening, leavening, listening, deafening, screening, awakening, lessening, worsening.