tard= slow 慢 retard v. 延迟；妨碍
re 一再 + tard 慢 → 一慢再慢 → 延迟 retardant n. 延迟剂
retard 延迟；妨碍 + ant 表名词 → 延迟剂
retardant adj. 使延迟的 tardigrade adj. 行动缓慢的
tardi〔= tard〕慢 + grad 步 + e → 步履迟缓 → 行动缓慢的 tardiness n. 拖拉
tardi〔= tard〕慢 + ness 性质，状态 → 拖拉
tardive adj. （疾病）延迟发作的
tard 慢 + ive 有…性质的 → 发病速度慢 → 延迟发作的 tardy adj. 缓慢的
tard 慢 + y 多…的，有…的 → 缓慢的
If you describe something or someone as tardy, you think that they are later than they should be or later than expected.
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