Where does “tính nhẩm” come from?

tính nhẩm (Vietnamese) comes from Vietnamese tính, from Proto-Athabaskan tən, from Persian تن, from English ton, from French ton, from Old French ton, from Latin tuus, from Russian туз.

tính nhẩm (Vietnamese): to do mental arithmetic, mental calculation, mental math

Definitions

  1. to do mental arithmetic, mental calculation, mental math

Ancestry of “tính nhẩm”, step by step

tính nhẩm traces back through two separate lines of ancestry.

via Vietnamese tính

StepLanguageWordMeaning
1Vietnamesetínhto calculate; to think of; to be of a mind;...
2Proto-Athabaskantənice, frost
3Persianتنbody; person; tonne
4EnglishtonA unit of weight equal to 2240 pounds or 2000...
5FrenchtonYour, thy; Tone; Tone, shade
6Old Frenchtonyour
7Latintuusyour
8Russianтузace; bigwig; two-oar dinghy
9Polishtuzace; luminary, person of importance in their...
10Polishtuhere
11Polishbyćto be
12Polishmócto be able; may, might; to be allowed
13Old Polishmóccan, may, to be able to
14Proto-Slavicmoťьpower
15Proto-Indo-Europeanmógʰtis

via Vietnamese nhẩm

StepLanguageWordMeaning
1Vietnamesenhẩmto read silently (to try to memorise); to say under one's breath
2Chinese
3Proto-Sino-Tibetans-njamto think; mind, thought
Every word from Proto-Indo-European mógʰtisEvery word from Proto-Slavic moťьEvery word from Old Polish móc