noun
lumping together; bundling; grouping as one
Refers to treating multiple distinct items, people, or ideas as a single undifferentiated group, often with a negative nuance of oversimplification. Commonly used with する to mean 'to lump together'.
いろいろな意見を一括りにしてはいけない。
You shouldn't lump various opinions together.
彼は複雑な問題を一括りにした。
He lumped the complex issues together.
一括 is more formal and often used in business or technical contexts for 'batch processing' or 'lump sum', while 一括り is more colloquial and carries a nuance of oversimplification.
十把一絡げ is a stronger, more idiomatic expression for 'lumping together' with a clearly negative connotation, implying unfair generalization.
Compound of 一 (ひと, 'one') and 括り (くくり, 'bundle' or 'grouping'), from the verb 括る (くくる, 'to tie up' or 'to bundle'). The literal meaning is 'one bundle', extended to the abstract sense of treating things as a single group.