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胃痛， いつう
1. stomach-ache, stomach pain, gastralgia
胃痛、胃痉挛
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苦しむ， くるしむ
1. to suffer, to groan, to be worried
受苦，呻吟，忧虑
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