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忍び込む， 忍びこむ， 忍込む， しのびこむ
1. to creep in, to steal in, to sneak in
悄悄地进入；偷偷地进来；潜入
家， いえ
1. house, residence, dwelling
2. family, household
3. lineage, family name
房子，住宅；家；家族
に
1. at (place, time), in, on, during
2. to (direction, state), toward, into
3. for (purpose)
4. because of (reason), for, with
5. by, from
6. as (i.e. in the role of)
7. per, in, for, a (e.g. "once a month")
8. and, in addition to
9. if, although
tbd