expression
warming of water in spring
A seasonal phrase (kigo) used in haiku and poetic language to evoke early spring, when the water begins to lose its winter chill.
水温む季節、川辺を散歩するのが心地よい。
In the season when the water warms, it's pleasant to walk along the riverside.
俳句で「水温む」は春の季語としてよく使われる。
In haiku, 'mizu nurumu' is often used as a spring seasonal word.