1.
to be crowded; to be packed
For a place to be densely crowded with buildings or people.
建物が立て込んでいる地域だ。
It's an area densely packed with buildings.
2.
to be busy; to be swamped
To be occupied with many tasks or appointments in succession.
今日は予定が立て込んでいます。
I'm swamped with appointments today.
仕事が立て込んでいて会えない。
I'm too busy with work to meet.
COMPOUND VERB:
立てる (to set up) + 込む (to become crowded)
TRANSITIVITY:
自動詞 (intransitive)
COMMON COLLOCATIONS:
- 予定が立て込む: to be swamped with appointments
- 仕事が立て込む: to be busy with work
- 建物が立て込む: buildings are densely packed
NUANCE:
Often used to politely decline invitations or explain unavailability—implies being unavoidably busy.