English ⇄ Russian

catch smb. by the arm stresses
gen.	поймать кого-л. за руку (by the collar, by the sleeve, by the button, by the scruff of the neck, etc., и т.д.); схватить кого-л. за руку (by the collar, by the sleeve, by the button, by the scruff of the neck, etc., и т.д.)
catch someone by the arm
Makarov.	схватить кого-либо за руку