迂濶[ukatsu] careless
快濶[kaikatsu] cheerful
久濶を叙す[kyuukatsuwojosu] to apologize for a long neglect of friends (apologise)
天空海濶[tenkuukaikatsu] the open sky and the serene sea

久濶[kyuukatsu] not having met or contacted someone for a long time
濶達[kattatsu] openhearted
濶歩[kappo] striding
自由濶達[jiyuukattatsu] free and easy