しっかり

Adjective

 * 1) tight
 * 2) reliable

Adverb

 * 1) fast (in a firm or secure manner), tightly
 * 2) surely, unwaveringly, steadily, reliably

Noun

 * 1) stable, fulfilled

Verb

 * 1) be fast, securely in place
 * 2) be reliable, level-headed
 * 3) keep going, keep trying