This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

v. Present participle of approximate.

"Until the native militia was organised, Russian troops, not exceeding fifty thousand in number, were to occupy the country; this occupation, however, was to be limited to a term approximating to two years."

close    inexact   

approximated    approximates    approximating   

formula   

approaching    proximate    approach    draw    rough   

proximate   

exact    numerical    optimum    nominal    theoretical