大

1. prefix, na-adjective, noun large; big; great; huge; vast; major; important; serious; severe
2. prefix great; prominent; eminent; distinguished
3. suffix -sized; as big as; the size of
4. suffix, abbreviation university
5. noun large (e.g. serving size); large option
6. abbreviation long month (i.e. having 31 days)
7. abbreviation feces; faeces; excrement; stool

おお

1. prefix large; big; great; major; important; serious; heavy; loud
2. older; senior
3. final; ultimate
4. rough; broad; general

おおき also 大き

1. prefix, archaic great; grand; large
2. also written as 正 greater (of equal court ranks); upper; senior
3. noun, na-adjective a great deal; very much

おおい also 大い

1. prefix, archaic, also written as 正 greater (of equal court ranks); upper; senior

たい

1. prefix, abbreviation nth year in the Taishō era (1912.7.30-1926.12.25)