Final answer:
The term 'lack-a-rrhythmia' combines 'lack-a-' and '-rrhythmia' to refer to the absence of a regular rhythm, particularly in heartbeats.
Step-by-step explanation:
Lack-a- is a prefix indicating absence or deficiency. For example, in the term lackadaisical, the prefix 'lack-a-' conveys the meaning of lacking energy or enthusiasm. On the other hand, -rrhythmia is a suffix denoting an irregular rhythm. When combined, lack-a- and -rrhythmia create the term lack-a-rrhythmia, which refers to a condition characterized by the absence of a regular rhythm, particularly in the context of heartbeats.
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