セン, すす.める, こも
recommend, mat, advise, encourage, offer
JLPT1 G7 S16 F1082
廌 here a variant of 塵# (advancing herd of deer) + 艸 grass/plant → herd of deer grazing as it advances → advance to present an offering → *urge*; *recommend* (← urge another to advance).
[Full Kanji Etymology List]