na·ta·to·ri·al 
(nā′tə-tôrē-əl, năt′ə-) also na·ta·to·ry (nātə-tôr′ē, nătə-)
(nā′tə-tôrē-əl, năt′ə-) also na·ta·to·ry (nātə-tôr′ē, nătə-)adj.
Of, relating to, adapted for, or characterized by swimming: a natatorial appendage; natatorial birds.
[From Late Latin natātōrius, from Latin natātor, swimmer, from natātus, past participle of natāre, frequentative of nāre, to swim; see snā- in the Appendix of Indo-European roots.]
- Indo-European root: sē-
- Indo-European root: sēmi-
- Indo-European root: sū-
- Indo-European root: tag-
- Indo-European root: tauro-
- Indo-European root: tegu-
- Indo-European root: tek-
- Indo-European root: teks-
- Indo-European root: telə-
- Indo-European root: tem-
- Indo-European root: ten-
- Indo-European root: terkw-
- Indo-European root: ters-
- Indo-European root: terə-
- Indo-European root: terə-
- Indo-European root: teutā-
- Indo-European root: teuə-
- Indo-European root: tkei-
- Indo-European root: to-
- Indo-European root: tolkw-
- Indo-European root: tong-
- Indo-European root: treb-
- Indo-European root: trei-
- Indo-European root: trep-
- Indo-European root: treud-