The Japanese word for trunk is
幹

みき - miki

Japanese Definition

trunk
1. 名詞. 幹みき、樹幹
2. 名詞. （旅行用の）トランク
3. 名詞. （人などの）胴体
4. 名詞. 象の鼻はな
5. 名詞. （昆虫の）胸部
6. 名詞. (米, Canada)（自動車後部の）トランク
7. 名詞. （trunksのみ、絶対複数）（水泳などの）トランクス
8. 名詞. (米)（電信）中継回線
9. 名詞. （運河・川の）主要水路
10. 名詞. 幹線、本線

Translations for trunk and their definitions

鼻
1. n. nose
2. n. (elephant or elephant seal) trunk
3. pron. first-person personal male pronoun; I, me

幹
1. n. (from 1726) the trunk or core of something:
2. n. a tree trunk
3. n. a plant stalk
4. affix. tree trunk; stem
5. affix. main part; core
6. affix. talent; capability

行李
1. counter. (from 1867) (used to count items of luggage, cargo, or freight): box, bundle, item, bale, package
2. counter. Usage: More commonly encountered with the shortened reading kori.
3. n. (from 1612) a wicker trunk used as luggage, with a lid that slides down over the top, generally made of bamboo, willow, or wisteria
(synonyms, ja, 葛籠, tr1=tsuzura, pos1=more general term for any wicker basket or box)
4. n. (from 892) a messenger, an envoy
(synonyms, ja, 使者, tr1=shisha)
5. n. (from 706) luggage, baggage q, what one takes on a trip to contain one's possessions
(synonyms, ja, 荷物, tr1=nimotsu)
6. n. (from early 1100s) a trip, a voyage q, by extension from the luggage sense
(synonyms, ja, 旅, tr1=tabi, 旅行, tr2=ryokō)
7. n. (from 1939) (historical) in the former Japanese army, the unit tasked with transporting materiel and supplies: w, military logistics
8. counter. (from late 1870s) (used to count items of luggage, cargo, or freight): box, bundle, item, bale, package
9. n. (from 1523) a bundle of one or more pieces of luggage secured with rope or cord
10. n. (from 1603) a wicker trunk used as luggage, with a lid that slides down over the top, generally made of bamboo, willow, or wisteria
(synonyms, ja, 葛籠, tr1=tsuzura, pos1=more general term for any wicker basket or box)
11. n. (from 1230s) (Zen) alternative spelling of ja 行履 (anri): daily life, what one does in a regular day
(synonyms, ja, 行住坐臥, tr1=gyōjūzaga, pos1=Zen terminology, lit1=going, staying, sitting, lying down, 日常生活, tr2=nichijō seikatsu, pos2=general terminology, lit2=daily lifestyle)
(synonyms, ja, 荷物, tr1=nimotsu)
(synonyms, ja, 使者, tr1=shisha)