1ta·per 
/ˈteɪpɚ/ verb
ta·pers; ta·pered; ta·per·ing /ˈteɪpɚ/ verb [no obj] : to become gradually smaller toward one end
▪ leaves that taper to a point ▪ Her slacks taper [=become narrower] at the ankle.
▪ leaves that taper to a point ▪ Her slacks taper [=become narrower] at the ankle.
taper off [phrasal verb]
: to become gradually less and less : to decrease slowly
▪ Production has been tapering off.
▪ Production has been tapering off.
— tapered adjective [more tapered; most tapered]
▪ tapered slacks
▪ tapered slacks
