cigarette or pipe tobacco / CL:根[gen1] / smoke / mist / vapour / CL:縷|缕[lü3] / tobacco plant / (of the eyes) to be irritated by smoke
烟
=
因
+
火
:
Maud Younger (y) is giving René Descartes (因) fire (火) for his tobacco (烟) pipe in front of the anthill (an1).