てくてく
tekuteku

To-Adverb

1. (walking a long distance) at a steady pace; intently; earnestly; single-mindedly; trudgingly; ploddingly

Onomatopoeia
この あつさに いち れいマイルもてくてく あるくのはたまらない。
kono atsusani jūmairumo tekuteku aruku nowa tamaranai
I can't bear to tramp ten miles in this heat.