English
[1] old; aged; venerable [2] always [3] the youngest [4] very [5] a particle indicating ordinal numbers to designate order of birth [6] parents; [7] a particle used before a man's family name to indicate familiarity and friendship [8] tough (meat); overcooked [9] [v] treat with the reverence [10] dark (color) [11] [Wu] very

Mandarin (hanyu pinyin)
lǎo

Cantonese (jyutping)
lou⁵

Hakka (phonetic)
[Kwangtung] lau³ [Bao'an] lau³ [Dongguan] lau³ [Hailu] lau³ lo³ lo⁶ [Siyan] lau³ lo³ lo⁵ [Hong Kong] lau³ [Meixian] lau³

Minnan/Taiwanese
lau2

Vietnamese
lão

Japanese
rou

Korean
lo