al·ter·na·tion 
(ôl′tər-nāshən, ăl′-)
(ôl′tər-nāshən, ăl′-)n.
Successive change from one thing or state to another and back again.
- Indo-European root: ant-
- Indo-European root: anə-
- Indo-European root: apo-
- Indo-European root: ar-
- Indo-European root: arg-
- Indo-European root: as-
- Indo-European root: at-
- Indo-European root: au-
- Indo-European root: aug-
- Indo-European root: aus-
- Indo-European root: awi-
- Indo-European root: awo-
- Indo-European root: ayer-
- Indo-European root: ayes-
- Indo-European root: bak-
- Indo-European root: bel-
- Indo-European root: bha-bhā-
- Indo-European root: bhad-
- Indo-European root: bhag-
- Indo-European root: bhardh-ā-
- Indo-European root: bhares-
- Indo-European root: bhau-
- Indo-European root: bhegw-
- Indo-European root: bhei-
- Indo-European root: bheid-