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optionally

ADVERB

unnecessarily

Synonyms

WEAK

avoidably unessentially uselessly

Antonyms

WEAK

indispensably necessarily unavoidably

ADVERB

voluntarily

Synonyms

STRONGEST

deliberately freely intentionally spontaneously willingly

WEAK

at one's discretion by choice by preference of one's own accord on one's own on one's own initiative with all one's heart without being asked without prompting

Antonyms

STRONGEST

unintentionally

WEAK

forced involuntarily obligatory

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.