stylistic:tone
Vocabulary

There are more polysyllabic words in Mandarin than in all other major varieties of Chinese except Shanghainese. This is partly because Mandarin has undergone many more sound changes than southern varieties of Chinese have, and needed to deal with many more homophones. New words have been formed by adding affixes such as lao- (老), -zi (子), -(e)r (儿 / 兒), and -tou (头 / 頭), or by compounding, e.g. by combining two words of similar meaning as in cōngmáng (匆忙), made from elements meaning "hurried" and "busy".A distinctive feature of southwestern Mandarin is its frequent use of noun reduplication, which is hardly used in Beijing. In Sichuan, one hears bāobāo (包包) "handbag" where Beijing uses bāor (包儿).There are also a small number of words that have been polysyllabic since Old Chinese, such as húdié (蝴蝶) 'butterfly'.

The singular pronouns in Mandarin are wǒ (我) 'I', nǐ (你 or 妳) 'you', nín (您) 'you (formal)', and tā (他, 她 or 它 / 牠) 'he, 'she', 'it', with - men (们 / 們) added for the plural. Further, there is a distinction between the plural first-person pronoun zánmen (咱们 / 咱們), which is inclusive of the listener, and wǒmen (我们 / 我們), which may be exclusive of the listener. Dialects of Mandarin agree with each other quite consistently on these pronouns. While the first and second person singular pronouns are cognate with forms in other varieties of Chinese, the rest of the pronominal system is a Mandarin innovation (e.g., Shanghainese has non 侬 / 儂 'you' and yi 伊 'he', 'she').

Because of contact with Mongolian and Manchurian peoples, Mandarin (especially the Northeastern varieties) has some loanwords from these languages not present in other varieties of Chinese, such as hútòng (胡同) "alley". Southern Chinese varieties have borrowed from Tai, Austroasiatic, and Austronesian languages.

There are also many Chinese words which come from foreign languages such as gāo'ěrfū (高尔夫) from "golf"; bǐjīní (比基尼) from "bikini", and hànbǎo bāo (汉堡包) from "hamburger".

In general, the greatest variation occurs in slang, in kinship terms, in names for common crops and domesticated animals, for common verbs and adjectives, and other such everyday terms. The least variation occurs in "formal" vocabulary—terms dealing with science, law, or government.