Akademik

untier

noun

a person who unfastens or unwraps or opens

- children are talented undoers of their shoelaces

• Derivationally related forms: ↑untie, ↑unfasten (for: ↑unfastener), ↑open (for: ↑opener), ↑undo (for: ↑undoer)

• Hypernyms: ↑person, ↑individual, ↑someone, ↑somebody, ↑mortal, ↑soul

Useful english dictionary. 2012.