しっかり

kare wa wakai noni, totemo shikkari shite iru.

Although he is young, he is very reliable.

abunai desu kara, tesuri ni shikkari tsukamatte kudasai.

Please hold on tightly to the handrail as it is dangerous.

natsubate shinai yōni, mainichi shikkari gohan o tabemashō.

Let's eat properly every day so we don't get summer fatigue.

raishū no tesuto ni mukete, konshūmatsu wa shikkari benkyō shimasu.

I will study hard this weekend for next week's test.

kaze o hayaku naosu tame ni, konya wa shikkari nete kudasai.

Please get a good night's sleep tonight to recover from your cold quickly.

dekakeru mae ni, mado no kagi ga shikkari shimatte iru ka kakunin shite kudasai.

Before going out, please check if the windows are locked securely.