本影 is read as ほんえい (honei) and means umbra.
ほんえい
honei
えいいんぼん
facsimile edition
さつえいだいほん
shooting script (film, television)
にっぽんほうしゃせんえいきょうがっかい
Japan Radiation Research Society
ほんだな
bookshelves
ほんし
main object
ほんるいだ
home run
ほんらん
this column
ほんきょ
stronghold
ほんるい
home base
ほんたい
these troops
ほんぎ
true meaning
ほんすじ
main thread (of a story)