chapter  18
DIRECTIONAL VERBS AS SUCCESS MARKERS IN THAI: ANOTHER GRAMMATICALIZATION PATH
ByKingkarn Thepkanjana, Satoshi Uehara
Pages 23

Directional verbs refer to verbs which denote movements described in terms of their directionality with respect to a Landmark,1 being directed towards or away from it. The landmark is not treated as the source nor the destination of a movement. Rather, the landmark is a known point in the path of movement and it may be construed as a possible source or destination if the movement were to be conceived as starting at one landmark and continuing to another landmark. Any physical entity may function as a landmark in specifying the direction of the movement. On this basis, directions may be specified as towards and away from such entities functioning as landmarks.