unreproachable

Without any fault

Beyond criticism or blame; faultless in conduct or character.

Unreproachable describes someone whose behavior leaves no room for accusation or censure: Her record in office was unreproachable.

The word carries more weight than simply "good"—it suggests conduct that has withstood scrutiny.

Irreproachable means the same thing and is more common.

moral

blameless

Free of wrongdoing

virtuousMorally excellent, principled
uprightVertical or morally sound
honorableHaving high moral standards

principled · righteous · ethical · scrupulous · conscientious · incorruptible · trustworthy · integrity · noble · just

flawless

impeccable

Free from any defect

faultlessFree from any defect
perfectWithout any flaw
unblemishedFree from any defect

spotless · untarnished · immaculate · unassailable · exemplary · unerring · unquestionable · unchallengeable · incontestable · airtight

conduct

proper

Socially appropriate

decorousSocially appropriate, dignified
correctFree from error
seemlyConforming to propriety

fitting · appropriate · dignified · respectable · becoming · gentlemanly · ladylike · well-mannered · polished · refined

Opposites

moral blameworthiness

unreproachablereproachable

Deserving blame or criticism

blameworthy · culpable · reprehensible · censurable · shameful

Family

reproach, approachable, approaches, approached, reproachful, reproachable, reproachfully, reproaching, reproaches

Familiarity: Top 500,000
Profile: Used worldwide · Timeless · Abstract · Positive · Everyday, not technical · Rated G