erratically

In jagged fashion

Moving or behaving in an unpredictable, inconsistent way—without a regular pattern or direction.

A car swerving erratically suggests the driver may be impaired.

Someone who acts erratically shifts moods or decisions without apparent logic: She's been sleeping erratically since the baby was born.

The adverb implies deviation from what's expected or steady.

aimless

randomly

Without deliberate selection

unsystematically · unmethodically · carelessly · sloppily · disjointedly · desultorily · directionlessly · purposelessly · wanderingly · meanderingly

sporadic

intermittently

At irregular intervals

spasmodically · fitfully · episodically · patchily · discontinuously · unevenly · periodically · inconsistently · sporadically · off-and-on

chaotic

unpredictably

Without foreseeable pattern

frenziedly · manically · uncontrollably · tempestuously · tumultuously · riotously · convulsively · violently · stormily · feverishly

unpredictable

capriciously

In unpredictable fashion

spontaneously · mercurially · unreliably · changeably · temperamentally · waywardly · inconstantly · unstably · variably · unsteadily

Categories
Opposites
consistency and regularity

erraticallyconsistently

In an unchanging way

steadily · regularly · constantly · uniformly · predictably

deliberation and method

erraticallysystematically

In organized, planned fashion

methodically · deliberately · purposefully · intentionally · purposely

stability and steadiness

erraticallysteadily

In constant, unwavering fashion

smoothly · evenly · stably · calmly · gently

Family

erratic, errant, erroneous

Familiarity
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Used worldwide · Timeless · Abstract · Everyday, not technical · Rated G