| heikko | weak, frail |
|---|---|
| heiketä | to weaken, to decline |
| heikkeneminen | weakening, deterioration |
| heikentää | to weaken, to impair |
| heikentyä | to weaken, to deteriorate |
| heikosti | weakly, poorly |
| heikottaa | to weaken, to make weak |
| heikkous | weakness |
| heikkotasoinen | low-quality, inferior |
| heikko tuuli | light wind |