irregular
/ɪˈɹɛɡ.jʊ.lə/ · /ɪˈɹɛɡjəlɝ/
Meaning 1
Not even or uniform in shape.
“She noticed the irregular pattern on the wall.”Add to my deck
Meaning 2
Happening at unpredictable times or intervals.
“The irregular deliveries made planning difficult.”Add to my deck