Н179
ТЯЖЁЛ (ТЯЖЁЛЫЙ) НА НОГУ
collAdjPsubj-compl with copula,
subj:
human (both variants) or
modif (
var. with long-form
Adj)
fixed WO (
var. with short-form
Adj)) one cannot walk long distances, one tires easily
X тяжёл на ногу = X's legs give out easily
X has trouble walking.